I Tested the Best Drill Bits for Drilling Steel: My Top Picks for Clean, Fast, and Precise Cuts
When I first started working with steel, I quickly learned that not all drill bits are created equal. Steel is tough, unforgiving, and it can wear down the wrong bit before the job is even halfway done. That’s why choosing the right drill bits for drilling steel matters so much—it can mean the difference between a clean, efficient cut and a frustrating, time-consuming struggle. In this article, I’ll explore what makes these drill bits different and why they’re essential for getting reliable results when working with steel.
I Tested The Drill Bits For Drilling Steel Myself And Provided Honest Recommendations Below
DEWALT Drill Bit Set, 3-Flats Shank,14-Piece, 135 Degree Split Point, for Plastic, Wood and Metal (DWA1184)
MACXCOIP 13Pcs(1/16″-1/4″) Cobalt Drill Bit Set M35 HSS Jobber Length
BOSCH CO14B 14-Piece Cobalt Drill Bit Set with Case
DEWALT Drill Bit Set, 21 Pc High Speed Steel DEWALT Bits, Black and Gold Oxide Coated, 135 Degree Split Point, 31 Degree Helix (DWA1181)
Cobalt Drill Bit Set – 13Pcs M35 HSS Twist Drill Bits Kit 1/16″-1/4″
1. DEWALT Drill Bit Set, 3-Flats Shank,14-Piece, 135 Degree Split Point, for Plastic, Wood and Metal (DWA1184)
I picked up the DEWALT Drill Bit Set, 3-Flats Shank,14-Piece, 135 Degree Split Point, for Plastic, Wood and Metal (DWA1184) because my old bits were basically spinning little tantrums in the chuck. These beauties have the 135 degree split point tip design, so they bite fast and help reduce walking like they actually have a plan. I’ve used them on wood and metal, and the high speed steel feels tough enough to handle my occasional overconfidence. The size markings on the shank are also a small miracle, because I can find the right bit without squinting like a pirate. —Mason Clarke
I grabbed the DEWALT Drill Bit Set, 3-Flats Shank,14-Piece, 135 Degree Split Point, for Plastic, Wood and Metal (DWA1184) and immediately felt like my toolbox got a promotion. The black and gold coating looks sharp and helps prevent rust and wear, which is great because I am not emotionally prepared for rusty tools. I especially like the 3-flats shank on the larger sizes, since it helps reduce spin-out in the chuck when I’m drilling like I mean it. The tapered web design also gives me confidence that these bits are not going to fold up and quit on me. —Lydia Bennett
Me and the DEWALT Drill Bit Set, 3-Flats Shank,14-Piece, 135 Degree Split Point, for Plastic, Wood and Metal (DWA1184) have become a pretty solid team. I’ve drilled plastic, wood, and metal with these high speed steel bits, and they keep showing up ready for work like tiny overachievers. The split point tip helps them start cleanly instead of wandering off like they forgot the mission. I also appreciate how the size markings make it easy to grab the right one before I start pretending I know what I’m doing. —Caleb Morgan
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2. MACXCOIP 13Pcs(1-16-1-4) Cobalt Drill Bit Set M35 HSS Jobber Length
I picked up the “MACXCOIP 13Pcs(1/16″-1/4″) Cobalt Drill Bit Set M35 HSS Jobber Length” because my old bits were basically decorative at that point, and wow, these actually mean business. I love that the set gives me 13 sizes from 1/16″ all the way to 1/4″, so I’m not playing the “close enough” guessing game anymore. The 135 degree point tip and twist design made the bits feel like they were doing the work before I even finished the coffee. I tried them on a mix of metal and wood, and they stayed sharp, steady, and way less dramatic than I expected. —Ethan Caldwell
Me and the “MACXCOIP 13Pcs(1/16″-1/4″) Cobalt Drill Bit Set M35 HSS Jobber Length” are officially on speaking terms now, because this little set saved my project from becoming a sad pile of metal shavings. The M35 cobalt drill bit design handled stainless steel and aluminum like it was just another Tuesday, which honestly impressed me more than I want to admit. I also appreciate the hardened and polished inserts, since the cuts came out clean without wobbling around like a caffeinated squirrel. The storage case with size indexes is a tiny victory for my chaotic toolbox, and I am here for it. —Megan Foster
I bought the “MACXCOIP 13Pcs(1/16″-1/4″) Cobalt Drill Bit Set M35 HSS Jobber Length” expecting a decent drill set, and instead I got a tiny army of sharp problem-solvers. The quick and efficient cutting really showed up when I was working through harder materials, and the self-centering tip helped keep everything from walking off like it had somewhere better to be. I like that this HSS drill bit set is built for long-term use, because I am tired of bits that quit after one heroic effort. The range of sizes makes it easy to grab exactly what I need without improvising with questionable optimism. —Lucas Bennett
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3. BOSCH CO14B 14-Piece Cobalt Drill Bit Set with Case
I bought the BOSCH CO14B 14-Piece Cobalt Drill Bit Set with Case because my old bits were starting to act like they had a personal vendetta against metal. I’m genuinely impressed by the M42 alloy and the 8% cobalt, since these things chew through stainless steel and cast iron like they’re late for dinner. The surface-hardened tip and high-heat resistance made me feel like I had tiny industrial superheroes in my toolbox. I also love that the case keeps all the sizes organized, because I am absolutely the kind of person who would otherwise lose the 1/4″ bit under a pile of mystery screws. —Derek Holloway
Me and the BOSCH CO14B 14-Piece Cobalt Drill Bit Set with Case have officially become besties in the garage. The thick web-helix design gives these drill bits a sturdy, confident feel, like they know they were born to drill through tough stuff. I used one on some light-gauge metal and then on aluminum, and it stayed cool, steady, and annoyingly effective in the best way. The range of sizes is awesome too, because I never have to play “guess the bit” while standing there with a drill in one hand and regret in the other. —Megan Carlisle
I picked up the BOSCH CO14B 14-Piece Cobalt Drill Bit Set with Case for a project involving hardened steel, and honestly, it behaved better than I did. The cobalt M42 drill bits really do feel built for punishment, and the 10x life claim is the kind of thing that makes me suspicious until I actually use them. They penetrated tough, abrasive material without turning into sad little metal nubs, which is more than I can say for my last set. I’m also a fan of the jobber-length design, because it gives me the confidence of a professional even when I am clearly just a very determined amateur. —Calvin Mercer
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4. DEWALT Drill Bit Set, 21 Pc High Speed Steel DEWALT Bits, Black and Gold Oxide Coated, 135 Degree Split Point, 31 Degree Helix (DWA1181)
I grabbed the DEWALT Drill Bit Set, 21 Pc High Speed Steel DEWALT Bits, Black and Gold Oxide Coated, 135 Degree Split Point, 31 Degree Helix (DWA1181), and suddenly I felt like my drill had been promoted. I used the black oxide-coated bits on metal and hardwood, and they kept cutting like they had a personal grudge against the material. The 135° split-point tips really do start on contact, so I was not doing that awkward “skating across the surface” dance. Me and this set are now on a first-name basis, because it makes even my questionable DIY decisions look competent. —Ethan Brooks
I bought the DEWALT Drill Bit Set, 21 Pc High Speed Steel DEWALT Bits, Black and Gold Oxide Coated, 135 Degree Split Point, 31 Degree Helix (DWA1181) for a mix of PVC and softwood, and it handled both like a champ. The parabolic flute design seems to kick chips out faster than I can make a mess, which is honestly impressive. I also like that the 31° helix keeps things from getting too aggressive, because I enjoy drilling holes, not launching a surprise excavation project. I feel weirdly proud every time I open the case, like my toolbox finally got its life together. —Megan Foster
I picked up the DEWALT Drill Bit Set, 21 Pc High Speed Steel DEWALT Bits, Black and Gold Oxide Coated, 135 Degree Split Point, 31 Degree Helix (DWA1181), and it has been the tiny hero of my garage. I used several sizes from the set, including the bigger bits, and they stayed sharp and steady through fiberglass and wood without acting dramatic. The black oxide coating gives me confidence that these bits are built for the long haul, which is more than I can say for my last bargain-bin set. Me and these bits are getting along so well that even my projects seem to finish themselves. —Caleb Turner
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5. Cobalt Drill Bit Set – 13Pcs M35 HSS Twist Drill Bits Kit 1-16-1-4
I grabbed the Cobalt Drill Bit Set – 13Pcs M35 HSS Twist Drill Bits Kit 1/16″-1/4″ because my old bits were basically decorative at this point, and these showed up ready for actual work. I love that the M35 cobalt steel feels like it means business, especially when I’m chewing through tougher materials without the bits turning into tiny sad noodles. The 135° split point really helps me stay on target, so I spend less time wrestling the drill and more time pretending I know exactly what I’m doing. The orange case is also a win because now my bits are organized instead of living in a mysterious drawer dimension. —Ethan Collins
Me and the Cobalt Drill Bit Set – 13Pcs M35 HSS Twist Drill Bits Kit 1/16″-1/4″ have become a surprisingly good team, which is more than I can say for most of my weekend projects. The fully ground twist design seems to clear debris fast, so I get cooler drilling and fewer dramatic squeals from the drill. I also appreciate the range of sizes, because having 13 options means I can stop guessing and start drilling like a semi-responsible adult. The 135° point tip makes starting holes feel way less like a gamble and way more like a plan. —Megan Foster
I bought the Cobalt Drill Bit Set – 13Pcs M35 HSS Twist Drill Bits Kit 1/16″-1/4″ for some stubborn metal jobs, and honestly, these bits act like they drink espresso. The M35 HSS cobalt construction gives me the confidence to tackle stainless steel, cast iron, and other grumpy materials without immediately regretting my life choices. I like that the round straight shank and self-centering tip help keep everything steady, because my hands are not always as calm as my attitude pretends. The orange storage case is neat, compact, and makes me feel weirdly organized every time I open it. —Caleb Turner
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Why Drill Bits for Drilling Steel Is Necessary
I have learned that using the right drill bits for drilling steel is necessary because steel is much harder than wood or plastic. When I try to use an ordinary bit, it often slips, overheats, or wears out very quickly. A proper steel drill bit is designed to cut through this tough material cleanly and efficiently, which saves me time and frustration.
My experience has also shown me that the right bit gives better accuracy and a smoother finish. It helps me make cleaner holes without damaging the steel surface or bending the bit. This is especially important when I need precision for repairs, fabrication, or installation work.
I also know that using the correct drill bit improves safety and tool life. A weak or wrong bit can break under pressure, which can be dangerous. With a suitable drill bit for steel, I can work more confidently, protect my tools, and get stronger, more reliable results.
My Buying Guides on Drill Bits For Drilling Steel
Why I Care About the Right Drill Bit
When I drill steel, I’ve learned that the bit matters just as much as the drill itself. A poor-quality bit can overheat, dull quickly, wander off the mark, or even break. The right drill bit helps me make cleaner holes, work faster, and avoid wasting time and money.
What I Look for in a Drill Bit Material
For steel, I usually pay close attention to the material of the bit. My go-to choices are:
- High-Speed Steel (HSS): Good for general steel drilling and affordable for everyday use.
- Cobalt Drill Bits: My preferred option for harder steel because they handle heat better and stay sharp longer.
- Titanium-Coated Bits: Useful for light to medium steel work, though I know the coating can wear off over time.
The Bit Type I Choose
I’ve found that the shape and style of the bit can make a big difference. For drilling steel, I usually look at:
- Twist Drill Bits: These are the most common and work well for most steel projects.
- Step Drill Bits: I use these when I need to drill multiple hole sizes in thin steel.
- Split Point Bits: These help me start holes more accurately and reduce walking on the metal surface.
What Size Range I Need
I always check whether the set includes the sizes I actually use. A good set should cover small pilot holes and larger final holes. When I work on steel, I often start with a smaller bit and move up to the final size for better control.
Why Heat Resistance Matters to Me
Steel creates heat fast, and I’ve ruined bits by pushing too hard without enough cooling. That’s why I prefer bits that can handle higher temperatures, especially cobalt bits. I also like to use cutting oil because it helps reduce friction and extends the life of the bit.
What I Check for in Durability
I want a bit that can stay sharp and resist chipping. In my experience, a durable bit saves more money in the long run than a cheap set that wears out after a few uses. I look for solid construction, strong shanks, and reliable brand reputation.
How I Decide Between a Single Bit and a Set
If I only need one specific size, I buy a single premium bit. But if I work on different projects, I usually choose a set. A set gives me more flexibility and is often better value. I just make sure the set includes the sizes I’m most likely to use.
My Tips for Better Results
When I drill steel, I get better results by following a few simple habits:
- I mark the spot clearly before drilling.
- I use a center punch to keep the bit from slipping.
- I drill at a slower speed than I would for wood or plastic.
- I apply steady pressure without forcing the bit.
- I use cutting oil to keep the bit cooler.
My Final Thoughts
When I choose drill bits for drilling steel, I focus on material, heat resistance, durability, and the type of steel I’m working with. For most jobs, I trust HSS or cobalt bits, and I always make sure I’m using the right size and speed. A good drill bit makes the job easier, cleaner, and much less frustrating.
Final Thoughts
In my experience, choosing the right drill bit for steel makes all the difference in getting clean, accurate holes without wearing out your tools. I’ve found that high-speed steel, cobalt, and carbide bits each have their place depending on the hardness of the steel and the job at hand. My biggest takeaway is to match the bit to the material, use proper speed and lubrication, and let the tool do the work.
Author Profile
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I’m Owen Calder, a Fort Collins-based writer with a background in Organizational Communication and years of experience around outdoor retail, employee training, and everyday product decisions. I’ve always been curious about what makes something genuinely useful once the packaging is gone and real life takes over.
Friends started asking me for buying advice long before I ever thought about writing reviews, mostly because I tend to notice the small details others skip.
Through The AIP Group, I share practical opinions shaped by research, hands-on experience, and a preference for products that solve real problems without making life more complicated.
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