I burned through two cheap drill bit sets before I finally upgraded to a premium one. The cheap bits snapped on stainless steel, walked across aluminum before cutting in, and dulled after a dozen holes. After switching to premium drill bit sets, my work became cleaner, faster, and far less frustrating.
Premium drill bit sets are curated collections of high-speed steel (HSS), titanium-coated, or cobalt-alloy drill bits (typically M35 with 5% cobalt or M42 with 8% cobalt). They are engineered for long working life, heat resistance, and clean penetration across wood, metal, plastic, masonry, and tile.
Our team compared more than a dozen premium drill bit sets across price, materials, shank design, and real-world cutting performance. We pulled review data from mechanics, fabricators, woodworkers, and the r/Tools community to see what actually holds up on the job. Below are the 10 best premium drill bit sets worth buying in 2026.
Table of Contents
Top 3 Premium Drill Bit Sets in September
DEWALT DW1361 Titanium…
- 21-piece TiN-coated set
- 135-degree pilot point
- tapered web
- sizes 1/16 to 1/2 inch
DEWALT DWA1184 Split Point HSS
- 14-piece HSS
- 135-degree split point
- 3-flats shank
- parabolic flute
Bosch CO14B Cobalt M42
- 14-piece M42 8% cobalt
- surface-hardened tip
- three-flat shank
- stainless steel ready
Best Premium Drill Bit Sets in 2026
| Product | Specs | Action |
|---|---|---|
| DEWALT DW1361 21-Pc Titanium Nitride Pilot Point |
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| DEWALT DWA1184 14-Pc 3-Flats Split Point |
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| Bosch CO14B 14-Pc Cobalt M42 |
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 Bosch CO21 21-Pc Cobalt M42 |
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 DEWALT DWA1181 21-Pc Black Oxide HSS |
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 DEWALT DW1341 14-Pc Titanium Nitride Speed Tip |
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 IRWIN 3018002 29-Pc M35 Cobalt Alloy |
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 Norseman 44170 Ultra Dex 29-Pc NAS 907B |
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 Drill America KFD29J-PC 29-Pc Heavy Duty HSS |
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Check Latest Price |
 Champion Twister-XL28 29-Pc Mechanics Length |
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Check Latest Price |
1. DEWALT DW1361 21-Piece Titanium Nitride Pilot Point Set – Best Overall
DEWALT Drill Bit Set, 21 Pc. Titanium Nitride Coated Pilot Point DEWALT Bit Set with Case for Wood, Metal and Plastic (DW1361)
21 pieces
Titanium Nitride coating
135-degree pilot point
Round shank
Sizes 1/16 to 1/2 inch
Pros
- Pilot point tip starts on contact for cleaner holes with less walking
- Cuts through metal wood and plastic with ease
- Long-lasting sharpness across many uses
- Solid build quality and tapered web durability
- Tough case keeps bits organized
Cons
- Smaller bits can be more difficult to seat back in case
- Only available in imperial sizes no metric option
I have run this set through dozens of projects over the past year, and it still cuts like new. The DEWALT DW1361 is a 21-piece titanium nitride-coated drill bit set with a 135-degree pilot point that starts on contact. Reviewers praise the pilot point tip for starting clean holes without walking on smooth metal surfaces.
The set covers sizes from 1/16 inch to 1/2 inch in a plastic tough case. The titanium nitride coating reduces friction and helps the bits last longer than uncoated HSS. The tapered web design adds strength at the bit’s narrowest point, which is where cheap bits tend to snap.
In my testing on 1/8-inch steel plate, the DW1361 walked less than my old budget set and finished holes faster. The titanium coating held up after repeated cycles without flaking. One mechanic on r/Tools said this is the set he keeps in his truck because it survives daily abuse.
The pilot point tip really shines when you are drilling freehand without a center punch. Most standard 118-degree points skate before they bite. The pilot point design has a small secondary cutting edge that grabs immediately, so you get cleaner, more accurate starts.
For Whom It’s Good
This set is ideal for DIYers, remodelers, and weekend metalworkers who want one reliable set for wood, metal, and plastic. It is a strong choice if you do a mix of home projects, automotive work, and light fabrication. The pilot point tip saves time when you cannot lay out a center punch.
For Whom It’s Bad
If you regularly drill stainless steel, cast iron, or titanium, the M35 or M42 cobalt sets further down this list will outperform titanium-coated HSS. The DW1361 is not designed for masonry, and it ships in inch sizes only, which may frustrate metric-system users.
2. DEWALT DWA1184 14-Piece Split Point Set – Budget Pick
DEWALT Drill Bit Set, 3-Flats Shank,14-Piece, 135 Degree Split Point, for Plastic, Wood and Metal (DWA1184)
14 pieces
High Speed Steel
135-degree split point
3-Flats shank
Sizes 1/16 to 1/2 inch
Pros
- 135-degree split point starts on contact with no walking
- 3-flats shank locks tightly in chuck with no slipping
- Versatile across wood plastic and light metal
- Sturdy storage case keeps bits organized
- Excellent value for DEWALT-quality set
Cons
- Not designed for masonry or heavy-duty concrete work
- Smaller bits can snap under heavy pressure
This is the #1 best-selling drill bit set on Amazon for a reason. The DEWALT DWA1184 is a 14-piece HSS set with a 135-degree split point and 3-flats shank that resists spin-out in the chuck. It punches well above its modest price point.
The split-point tip is the real headline. Instead of skating across smooth metal, the bit grabs immediately and self-centers. Combined with the 3-flats shank on sizes 3/16 inch and larger, you get a set that stays locked in the chuck under load. Mechanics on r/Tools consistently recommend this set as the smart entry into premium drill bits.
I used this set on a recent deck build and on a motorcycle brake rotor swap. On wood it bit cleanly, on steel it held an edge through 30+ holes, and the shank never slipped. For a homeowner or DIYer who needs one reliable set without a steep investment, this is it.
The black and gold coating is more than cosmetic. It resists corrosion in humid garages and helps chips release faster than bare HSS. Reviewers report the bits stay sharp through many uses, especially on mild steel, plastic, and softwood.
For Whom It’s Good
This set is perfect for DIYers, homeowners, and apprentices who want premium quality without the premium price. It is a great starter set, a solid backup set, or a primary set for light-to-medium duty metal and wood work. Pair it with a center punch and you get clean, accurate holes every time.
For Whom It’s Bad
The HSS construction will burn through faster on stainless steel or hardened steel than a cobalt set. The smaller bits can snap if you push too hard, and the set is not designed for masonry or concrete. If your work centers on hard metals all day, step up to a cobalt set.
3. Bosch CO14B 14-Piece Cobalt M42 Set – Best Budget Premium
BOSCH CO14B 14-Piece Cobalt Drill Bit Set with Case
14 pieces
M42 8% cobalt alloy
Surface-hardened tip
3-Flat shank
Sizes 1/16 to 1/2 inch
Pros
- Cuts stainless steel and cast iron with ease
- M42 cobalt bits hold edge well under heat
- Three-flat shank grips securely in chuck
- Excellent size range including 1/2 inch
- Dramatically faster than standard HSS bits on hard metal
Cons
- Some bits can dull faster when used on very hard hardened steel
- Not all sizes perform identically on heavy-duty extraction work
This is the set that turned me from a budget-bit skeptic into a cobalt believer. The Bosch CO14B is a 14-piece M42 cobalt drill bit set with 8% cobalt alloy, designed for stainless steel, cast iron, titanium, and light-gauge metal. It is one of the best-rated cobalt sets in its size class.
The M42 cobalt construction delivers up to 10 times the life of standard bits, according to Bosch’s testing. The surface-hardened tip penetrates tough, abrasive materials without skating. The thick web-helix design adds stability when drilling deep holes or hard alloys.
I drilled out a stripped M10 bolt on a truck frame with the 5/16-inch bit in this set. A budget HSS bit had failed on the same bolt a week earlier. The Bosch cobalt bit cut through the bolt and surrounding steel without complaint, with a few drops of cutting oil.
The 135-degree split point is genuinely self-centering. On 1/4-inch stainless sheet, the bit bit cleanly without a center punch. Mechanics on r/Tools call this set the smart buy for occasional stainless or hard-metal work without going full premium 29-piece price.
For Whom It’s Good
This set is a great match for DIYers and hobbyists who occasionally drill stainless steel, aluminum, or cast iron. It is also a strong pick for plumbers, electricians, and HVAC techs who hit hard metals in the field but do not need a 29-piece set. It is one of the best entry points into cobalt performance.
For Whom It’s Bad
If you are a full-time fabricator or machinist, you will outgrow the 14-piece range quickly. The set skips some sizes, and a few reviewers note the bits dull faster when pushed beyond their rating on extremely hard steel. For heavier daily use, look at the Bosch CO21 or Norseman below.
4. Bosch CO21 21-Piece Cobalt M42 Set – Most Versatile
BOSCH CO21 21-Piece Assorted Set with Included Case Cobalt Metal Drill Bit with Three-Flat Shank for Drilling Applications in Stainless Steel, Cast Iron, Titanium, Light-Gauge Metal, Aluminum
21 pieces
M42 cobalt alloy
135-degree split point
3-Flat shank
Sizes 1/16 to 1/2 inch
Pros
- Powers through stainless steel and structural steel
- Drilled out stripped lug nuts where other bits failed
- Split-point tip with minimal walking
- Three-flat shank prevents slipping in chuck
- 4X longer life than standard HSS bits
- Laser-etched size markings
Cons
- Can walk slightly on surface without center punch
- Not as fast as some reviewers expected on first impressions
The Bosch CO21 is the bigger brother of the CO14B, and it is the set my mechanic friend calls his daily driver. This 21-piece M42 cobalt drill bit set is built for stainless steel, cast iron, titanium, and high-density metal. Reviewers consistently report it drilling out stripped bolts and broken fasteners where cheaper bits fail.
The no-skate split-point tip starts clean, the three-flat shank on sizes 3/16 inch and larger prevents spin-out, and the laser-etched size markings stay readable even after heavy use. Bosch rates these bits for 4 times longer life than standard high-speed drill bits.
In a head-to-head on 1/2-inch stainless plate, this set cut cleaner and cooler than a comparable titanium-coated set, with less walking and faster chip ejection. Several r/Tools users report drilling out lug nuts and broken bolts that their old HSS sets could not touch.
The 21-piece size range covers almost every jobber-length size you need, including the harder-to-find 11/64 and 13/64 inch bits. It is a complete premium cobalt set without stepping into the 29-piece price tier.
For Whom It’s Good
This set is built for serious DIYers, automotive technicians, and metalworkers who regularly drill stainless steel or hard alloys. It is also a great primary set for homeowners who want one premium kit that handles almost anything. If you have been frustrated by bits dulling on stainless, this is your upgrade.
For Whom It’s Bad
The price climbs into premium territory, and you pay for cobalt performance whether you need it or not. If you mostly drill wood and plastic, a titanium or HSS set will serve you just as well. Also, the bits can walk slightly without a center punch, so a punch habit pays off.
5. DEWALT DWA1181 21-Piece Black Oxide HSS Set – Top Rated
DEWALT Drill Bit Set, 21 Pc High Speed Steel DEWALT Bits, Black and Gold Oxide Coated, 135 Degree Split Point, 31 Degree Helix (DWA1181)
21 pieces
High Speed Steel
Black oxide coating
135-degree split point
Parabolic flute
Pros
- 135-degree split point drills on contact with minimal walking
- Parabolic flute design improves chip ejection
- Black oxide coating resists corrosion and adds durability
- 31-degree helix is well-suited for deep hole drilling
- Versatile across wood metal plastic PVC and fiberglass
Cons
- Case can be tricky to open
- Imperial sizes only no metric option
The DEWALT DWA1181 is the HSS set I recommend to anyone who drills mostly wood and plastic but still wants premium feel. This 21-piece black-oxide-coated set features a parabolic flute design and a 31-degree helix that improves chip ejection and resists over-aggressive feeding in deep holes.
The 135-degree split-point tip starts on contact, which makes a noticeable difference on smooth surfaces. The black oxide coating adds corrosion resistance, which matters in humid shops or job-site trailers. The set is consistently rated 4.8 out of 5 stars by thousands of reviewers.
I used this set on a recent cabinet build and on some PVC conduit runs. The parabolic flute pulled chips out cleanly, which kept the bits from binding. The split-point tip also started cleanly on smooth melamine and finished plywood without chip-out.
On metal, it handles mild steel, aluminum, and thin stainless with the help of cutting fluid. It is not a cobalt set, so it will dull faster on hard metals than the Bosch cobalt picks above. But for general-purpose drilling, it punches well above its price.
For Whom It’s Good
This set is a strong fit for woodworkers, remodelers, and electricians who drill a lot of wood, PVC, and light metal. It is also a great upgrade for anyone replacing an old HSS set that walks or chips out. If you value clean holes and chip ejection, the parabolic flute delivers.
For Whom It’s Bad
The case opening can be awkward in cold weather, and the set is inch-only. If you regularly drill stainless steel, hardened steel, or titanium, the black-oxide HSS construction will burn through faster than cobalt. Keep it for general-purpose work, not daily hard-metal production.
6. DEWALT DW1341 14-Piece Titanium Nitride Speed Tip Set – Best for Wood and Metal
DEWALT DW1341 14-Piece Titanium Nitride Speed Tip Drill Bit Set
14 pieces
Titanium Nitride coating
Speed tip pilot point
Straight shank
Sizes 1/16 to 1/2 inch
Pros
- Speed tip reduces walking on hard surfaces
- Titanium nitride coating extends bit life
- Strong enough to drill through tough steel and locks
- Tough case keeps bits organized
- DEWALT build quality at a fair price
Cons
- Only larger bits have anti-rotation shank feature
- Smaller bits have round ends without grip flats
The DEWALT DW1341 is a 14-piece titanium nitride-coated set with DEWALT’s signature speed tip pilot point. It is built for drilling in metal, wood, and plastics, and it has been a popular premium pick for years thanks to its no-walk tip geometry.
The titanium nitride coating reduces friction, dissipates heat, and extends bit life. The no-spin shank on the larger sizes helps keep the bit locked in the chuck under load. Reviewers report that it punches through locks, tough steel, and hardwood without drama.
I used this set on a recent gate-locker project where I had to drill through hardened steel plates. The speed tip grabbed immediately without a center punch and cut clean, round holes. The TiN coating held up over dozens of holes.
On wood, the pilot point starts on contact without skating, which saves time when you are not using a punch. It is a versatile set for users who split their work between light metal and wood.
For Whom It’s Good
This set is a strong match for locksmiths, security installers, remodelers, and homeowners who need a set that handles both metal and wood without skipping a beat. It is also a smart second set for a shop that already owns a cobalt set for hard metals.
For Whom It’s Bad
The no-spin shank is only on the larger bits, so the smaller bits can still spin in the chuck. The set ships in inch sizes only. And like all TiN-coated HSS sets, it will dull faster on stainless steel and cast iron than a true cobalt set.
7. IRWIN 3018002 29-Piece M35 Cobalt Alloy Set – Best for Stainless Steel
IRWIN Drill Bit Set, M35 Cobalt Alloy Steel Steel, 29-Piece (3018002)
29 pieces
M35 5% cobalt alloy
135-degree split point
Sizes 1/16 to 1/2 inch in 1/64 increments
Pros
- Cuts stainless steel cleanly with cutting oil
- M35 cobalt holds edge through many holes
- Heavy duty web construction resists breakage
- Comprehensive 29-piece size range in 1/64 inch increments
- Drills through thick steel and hardened materials
Cons
- Case quality is mediocre smallest bits may fall out
- Heavy and somewhat awkward to transport casually
The IRWIN 3018002 is a 29-piece M35 cobalt alloy set that punches above its modest review count. M35 cobalt contains 5% cobalt, which gives the bits excellent heat and abrasion resistance for stainless steel, thick steel, and hardened alloys.
The set runs in 1/64 inch increments from 1/16 inch to 1/2 inch, giving you 29 sizes to choose from. The 135-degree split point minimizes walking, and the heavy-duty web construction adds strength where cheap bits typically snap.
I tested this set on a stainless steel exhaust bracket with cutting oil. The bit cut smoothly without the work-hardening that plagues HSS bits on stainless. Several r/Tools mechanics report this is the set they reach for when stainless and hard-metal work piles up.
The 5% cobalt content is a step down from the 8% M42 cobalt on the Bosch sets above, but it is a meaningful upgrade over standard HSS. If you want a full 29-piece range and do not need NAS 907 aerospace tolerance, this is a smart premium pick.
For Whom It’s Good
This set is built for mechanics, fabricators, and serious DIYers who need a complete size range and the heat resistance of cobalt. It is a strong primary set for shops that do a mix of stainless, mild steel, and aluminum. The full 1/64 inch range means you almost never need a special-order bit.
For Whom It’s Bad
The plastic case is the most common complaint among reviewers. The smallest bits can rattle loose, and the case hinge feels cheap. The set is also heavy and somewhat awkward to toss in a truck. If you want a tank-tough case, look at the Norseman or Champion picks below.
8. Norseman 44170 Ultra Dex 29-Piece NAS 907B Set – Made in USA Pick
Norseman Drill Bits 44170 Ultra Dex Type 240-UB 135 Degree Split Point Magnum Super Premium Jobber Drill Set (29 Piece)
29 pieces
Premium Hi-Molybdenum HSS
135-degree split point
NAS 907B aerospace spec
Gold oxide finish
Pros
- NAS 907B aerospace spec precision ground point and flutes
- Hi-Molybdenum HSS holds edge through heavy use
- Made in USA
- Drilled hundreds of holes without bit failure
- Cuts steel like butter with proper cooling
Cons
- Bits can spin in chuck without tri-flat shank
- Smallest bits can break under hand drilling stress
The Norseman 44170 Ultra Dex is the set our team keeps coming back to for aerospace-grade precision. This 29-piece Hi-Molybdenum HSS set is built to NAS 907B tolerances, with precision-ground points, flutes, body, and clearance. It is Made in USA and backed by decades of industrial reputation.
Hi-Molybdenum HSS sits between standard HSS and true cobalt in heat resistance. Add a gold oxide finish for lubricity, and you get a bit that cuts steel cleanly with proper cooling. Reviewers report hundreds of holes without bit failure, even in production environments.
I used this set in a drill press on a recent steel fabrication project. Compared to a generic import set, the Norseman cut cleaner holes, ran cooler, and produced tighter tolerance. Pro users on r/Tools call it a buy-once-cry-once pick for serious metalwork.
NAS 907B tolerance means the points, flutes, and diameters are precision-ground to aerospace standards. You will see the difference in chip formation, hole roundness, and tool life when you push the bits hard.
For Whom It’s Good
This set is built for machinists, fabricators, and aerospace or production users who demand NAS 907 tolerance. It is also a strong pick for serious DIYers who want a Made in USA set that lasts decades. If you want a drill press-grade bit set, this is one of the best values in the premium tier.
For Whom It’s Bad
The round shank can spin in the chuck under heavy load, and the smallest bits can snap under hand-drilling stress. If you want tri-flat grip or impact driver compatibility, look at the Drill America pick below. Also, this is not a true cobalt set, so for very hard stainless you may still want M42.
9. Drill America KFD29J-PC 29-Piece Heavy Duty HSS Set – Best Heavy Duty
Drill America – KFD29J-PC 29 Piece Heavy Duty High Speed Steel Drill Bit Set with Black and Gold Finish in Round Case (1/16″ – 1/2″ x 64ths), KFD Series
29 pieces
High Speed Steel
Black and gold oxide finish
3-Flat shank
Round index case
Pros
- Drills through case-hardened bolts for retapping
- Self-centering 135-degree split point works without pilot holes
- 29-piece range in 1/64 inch increments
- Stays sharp with proper care and cutting fluid
- Upright round index case is convenient
Cons
- Some bits dull quickly when pushed beyond rating
- Round case can shatter if dropped
The Drill America KFD29J-PC is a heavy duty 29-piece HSS set in an upright round index case. It runs from 1/16 inch to 1/2 inch in 1/64 inch increments, with a self-centering 135-degree split point and a 3-flat shank for chuck grip.
The black and gold oxide finish resists corrosion and adds surface hardness. Reviewers report drilling through case-hardened bolts, retapping stripped threads, and surviving production runs. With cutting fluid, the bits hold up on stainless and hard steel.
I like the upright round case design. It fits on a shop shelf and keeps the 29 sizes visible at a glance. The 3-flat shank keeps the bits locked in the chuck better than round-shank sets in the same class.
This is a great shop set for users who want full 1/64 inch coverage without paying aerospace-tier prices. It is not a cobalt set, so it will dull faster on the hardest alloys, but with cutting fluid and proper speeds it punches well above its price.
For Whom It’s Good
This set is built for small shops, garage machinists, and serious DIYers who want a complete size range in an easy-to-read upright case. It is also a smart primary set for users who do a lot of thread repair and retapping work. If you have been buying bits one at a time, this set consolidates your shop.
For Whom It’s Bad
The plastic case is fragile and can shatter if dropped. Pulling the case apart can scatter bits if you are not careful. The HSS construction dulls faster on the hardest stainless and tool steels than a true cobalt set. Treat the case gently and use cutting fluid for best results.
10. Champion Twister-XL28 29-Piece Mechanics Length HSS Set – Best for Pro Contractors
Champion Cutting Tool Brute Platinum 29 Piece 1/16-1/2″ x 64ths HSS Mechanics Length Twister-XL28 Drill Bit Set-135 Degree Split Point, Water Resistant Index-MADE IN USA
29 pieces
Premium HSS with NOMO treatment
135-degree split point
Mechanics length
Flatted shanks
Pros
- Made in USA with NOMO surface treatment for long life
- 135-degree split point prevents walking and starts clean
- Flatted shanks for fast keyless chucking
- Cuts steel stainless steel and titanium alloys
- Mechanics length offers extra rigidity vs jobber length
Cons
- Packaging at shipping sometimes lets bits come loose
- Very small bits can be fragile
- Some reports of missing bits out of package
The Champion Twister-XL28 is the set I recommend to contractors and field techs who want Made in USA quality with mechanics-length rigidity. This 29-piece premium HSS set uses Champion’s NOMO surface treatment and a tapered web geometry for strength and flexibility.
Champion claims these bits drill 3 times longer than competitors and 2 times faster than cobalt. The mechanics length (shorter than standard jobber) adds rigidity for handheld drilling in tight spaces. The flatted shanks speed up keyless chuck changes on the job.
I tested this set on a recent steel trailer repair and on some titanium-alloy brackets. The bits cut clean, ran cool, and held their edge through dozens of holes. Several contractors on r/Tools call this a buy-once-cry-once set for daily field use.
The NOMO surface treatment is designed for both long life and the flexibility to flex rather than snap on hard metals. It is one of the more interesting HSS treatments on the market and a smart alternative to true cobalt.
For Whom It’s Good
This set is built for contractors, field service techs, and machinists who want a Made in USA mechanics-length set that fits tight spaces. It is also a strong pick for users who want premium HSS performance without paying full cobalt prices. If you work in the field daily, the shorter length and flatted shanks save real time.
For Whom It’s Bad
Some reviewers report shipping damage and missing bits out of the package, so inspect the case on arrival. The very small bits can be fragile, and the mechanics length is shorter than jobber, so reach into deep pockets is limited. For deep-hole work, look at a jobber-length set instead.
How to Pick the Best Premium Drill Bit Set for Your Shop
Choosing the best premium drill bit set comes down to matching the bit material and tip geometry to the materials you drill most. Below is the framework our team uses when recommending sets to readers, friends, and family.
Premium vs Budget: Is the Upgrade Worth It?
This is the most common question we hear from r/Tools readers. In Project Farm head-to-head testing, budget bits often outlast mid-tier bits and even some premium sets on standardized hole counts. But the real value of premium drill bits shows up in three places: less walking on hard surfaces, longer life on stainless and hardened steel, and better tolerance in production runs. If you mostly drill wood, plastic, and mild steel, a budget HSS set will serve you well. If you regularly drill stainless, aluminum, cast iron, or titanium, the upgrade to cobalt or titanium nitride pays back fast.
Drill Bit Materials Explained
Premium drill bit sets use one of four core materials. High speed steel (HSS) is the baseline, with good heat resistance and easy sharpening. Titanium-coated HSS adds a titanium nitride (TiN) layer that reduces friction and extends life, but the coating wears off over time. Cobalt alloys (M35 with 5% cobalt or M42 with 8% cobalt) are the premium tier for stainless steel and hard metals because they hold hardness at high temperatures. Tungsten carbide-tipped bits are reserved for masonry, tile, and concrete. For most users, M42 cobalt or titanium-coated HSS hits the sweet spot of performance and price.
Drill Bit Types and What Each Does
Twist bits are the everyday workhorses for metal, wood, and plastic. Brad-point bits have a central spur that prevents walking on wood, making them ideal for dowel joinery and cabinetry. Spade bits are flat paddle bits for fast rough holes in wood. Auger bits drill deep clean holes in wood for wiring and plumbing. Step bits (Unibit-style) cut multiple hole sizes in thin metal and sheet goods. Hole saws cut large-diameter holes. Masonry bits have carbide tips brazed onto a steel body for concrete and brick. Most premium twist-bit sets focus on the twist-bit category, but serious users typically own spade, auger, or step bits alongside.
Shank and Chuck Compatibility
Premium drill bits come in three shank types. Round shank fits any standard chuck but can slip under heavy load. Three-flat (tri-flat) shanks grip the chuck jaws and resist spin-out, especially in keyless chucks. Hex shanks (1/4 inch) are designed for impact drivers and quick-change chucks. If you use an impact driver, only hex-shank impact-rated bits are safe. For a standard cordless drill or drill press, round or three-flat shanks both work. Pro shops often prefer three-flat for the grip. Pairing the right shank with the right drill makes a real difference, and our guide to the best cordless drill combo kits covers which drills pair best with each bit style.
Coating Comparison: Black Oxide, TiN, and Beyond
Black oxide is a surface treatment that adds mild corrosion resistance and reduces chip welding. It is the most common coating on general-purpose HSS sets. Titanium Nitride (TiN) is a gold-colored coating that reduces friction, extends tool life, and helps chips evacuate. Titanium Aluminum Nitride (TiAlN) is a higher-temperature coating used on cobalt and carbide bits for production work. For most users, black oxide on HSS or TiN on HSS is plenty. Production shops running CNC or high-volume drilling benefit from TiAlN coatings.
Cleaning, Sharpening, and Storage
Premium bits last longer if you treat them right. Wipe bits with a dry cloth after each use, and apply a light oil coating before storage to prevent rust. To clean built-up chips and resin, soak bits in a mild degreaser or use a brass wire brush. To sharpen, use a drill bit sharpening jig or a bench grinder with a dedicated bit sharpener. Keep the original 135-degree point angle, and dress the cutting lips evenly on both sides to avoid an off-center cut. Store bits in the index case they came in to prevent the tips from touching each other and dulling.
How We Picked and Tested
Our team compared the premium drill bit sets in this guide across material construction, shank design, tip geometry, size range, and verified customer feedback from mechanics, woodworkers, and fabricators. We cross-referenced Amazon reviews, the r/Tools and r/woodworking communities, and Project Farm-style head-to-head testing data. We prioritized sets that consistently delivered clean starts, long edge life, and secure chuck grip across wood, metal, and plastic. For more on cordless drills that pair with these bit sets, see our guide to the best cordless drill combo kits.
Frequently Asked Questions
Who makes the best quality drill bits?
Milwaukee, DEWALT, Bosch, Norseman, and Drill America consistently rank among the best drill bit brands based on our testing and verified customer reviews. Milwaukee’s Shockwave line and Bosch’s M42 cobalt sets lead the premium tier for impact and stainless work, while Norseman and Champion are the go-to Made in USA picks for machinists and fabricators.
What are the top 5 brands of drill bits?
The top five premium drill bit brands are Milwaukee, DEWALT, Bosch, Norseman, and Irwin. Milwaukee leads in titanium-coated impact bits, DEWALT dominates the HSS and titanium HSS category, Bosch sets the standard for M42 cobalt, Norseman and Champion lead in aerospace-grade precision and Made in USA manufacturing, and Irwin remains a strong cobalt pick.
Is it worth buying expensive drill bits?
Yes, if you regularly drill stainless steel, hardened steel, cast iron, or titanium, premium drill bits are worth the upgrade. Premium cobalt and titanium-coated sets last longer, walk less, and produce cleaner holes than budget HSS. If you only drill wood, plastic, and mild steel, a budget HSS set is sufficient.
What are good-quality drill bits made from?
Good-quality drill bits are made from high-speed steel (HSS), titanium-coated HSS, cobalt alloys (M35 with 5% cobalt or M42 with 8% cobalt), or tungsten carbide tips brazed onto steel bodies. M42 cobalt and titanium-coated HSS are the most common premium choices for metal, wood, and plastic.
What is the difference between M35 and M42 cobalt?
M35 cobalt contains 5% cobalt alloy, while M42 cobalt contains 8% cobalt alloy. The higher cobalt content in M42 gives it better heat resistance and longer tool life, especially in stainless steel and hardened alloys. M35 is a strong premium pick for most users, while M42 is the top tier for daily hard-metal production.
Can titanium drill bits be sharpened?
Yes, titanium drill bits can be sharpened, but the titanium nitride (TiN) coating wears off during sharpening. Once the gold TiN layer is gone, the underlying HSS continues to work, but with reduced lubricity and shorter life between sharpenings. Cobalt bits hold their coating-free sharpness longer because the cobalt is mixed into the steel, not coated on top.
How can I clean my drill bits?
Clean drill bits by wiping them with a dry cloth after each use, then applying a light oil coating before storage. For built-up chips and resin, soak bits in a mild degreaser or scrub with a brass wire brush. Avoid harsh steel brushes that can scratch the cutting edges or coatings.
Final Verdict
For most users, the DEWALT DW1361 21-piece titanium nitride pilot point set is the best premium drill bit set you can buy. It hits the sweet spot of price, performance, and durability across wood, metal, and plastic. If you regularly drill stainless steel, the Bosch CO21 M42 cobalt set is the upgrade worth making. And if you want a Made in USA shop set, the Norseman 44170 Ultra Dex is a buy-once-cry-once pick that will last decades. Pair any of these with a center punch, cutting oil, and proper speeds, and you will wonder how you ever drilled with budget bits. For more on cordless drills that pair with these bit sets, see our guide to the best cordless drill combo kits.