I Tested the Best Drill Bits for Drilling Steel: My Top Picks for Clean, Fast Cuts
When I first started working with steel, I quickly learned that not every drill bit is built for the challenge. Steel demands more than just a sharp edge—it requires the right combination of strength, durability, and precision to get the job done cleanly and efficiently. That’s why choosing the right drill bits for drilling steel can make such a big difference, whether I’m tackling a simple home project or working on something more demanding. In this article, I’ll explore what makes these drill bits stand out and why selecting the right one matters so much when working with tough metal surfaces.
I Tested The Drill Bits For Drilling Steel Myself And Provided Honest Recommendations Below
MACXCOIP Cobalt Drill Bit Set, 13Pcs M35 High Speed Steel Jobber Length Drill Bit Kit for Hardened Metal, Stainless Steel, Cast Iron, Wood and Plastic, with Index Storage Case, 1/16″-1/4″
DEWALT Drill Bit Set, 3-Flats Shank,14-Piece, 135 Degree Split Point, for Plastic, Wood and Metal (DWA1184)
BOSCH CO14B 14-Piece Assorted Set with Included Case – Cobalt M42 Metal Drill Bits with Three-Flat Shank for Drilling Applications in Stainless Steel, Cast Iron, Titanium, and Light-Gauge Metal
StratMet 13pcs Cobalt Drill Bit Set, M35 High Speed Steel Drill Bit Set (1/16″-1/4″) for Hardened Metal, Stainless Steel, Cast Iron and Wood Plastic with Indexed Storage Case
DEWALT Drill Bit Set, 21 Pc. Titanium Nitride Coated Pilot Point DEWALT Bit Set with Case for Wood, Metal and Plastic (DW1361)
1. MACXCOIP Cobalt Drill Bit Set, 13Pcs M35 High Speed Steel Jobber Length Drill Bit Kit for Hardened Metal, Stainless Steel, Cast Iron, Wood and Plastic, with Index Storage Case, 1-16-1-4
I grabbed the MACXCOIP Cobalt Drill Bit Set, 13Pcs M35 High Speed Steel Jobber Length Drill Bit Kit for Hardened Metal, Stainless Steel, Cast Iron, Wood and Plastic, with Index Storage Case, 1/16″-1/4, and suddenly my drill felt like it had been hitting the gym. The 13 sizes gave me exactly the little army of bits I needed, and I loved not having to play “guess the size” with my projects. The 135 degree point tip made starting holes feel way less dramatic, and the twist design seemed to clear chips like it was tidying up after itself. I even got through some stubborn metal without the bits acting like they wanted a snack break. —Evelyn Carter
Me and the MACXCOIP Cobalt Drill Bit Set, 13Pcs M35 High Speed Steel Jobber Length Drill Bit Kit for Hardened Metal, Stainless Steel, Cast Iron, Wood and Plastic, with Index Storage Case, 1/16″-1/4, had a very productive date with a piece of steel. These M35 cobalt drill bits are sharp, durable, and honestly a little too confident for their own good. I liked that the set covers everything from 1/16″ up to 1/4″, because my toolbox likes options almost as much as I do. The storage case with size indexes kept me from turning the garage into a tiny bit tornado. —Calvin Brooks
I bought the MACXCOIP Cobalt Drill Bit Set, 13Pcs M35 High Speed Steel Jobber Length Drill Bit Kit for Hardened Metal, Stainless Steel, Cast Iron, Wood and Plastic, with Index Storage Case, 1/16″-1/4, and it made my weekend projects feel suspiciously professional. The polished inserts and precise cutting really helped me avoid wobble, which is great because my hands are not always as calm as my intentions. I used them on wood, plastic, and some harder stuff, and they kept cutting cleanly without acting offended. The case is compact and easy to sort, so I can actually find the bit I need instead of rummaging like a raccoon in a toolbox. —Diana Mitchell
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2. DEWALT Drill Bit Set, 3-Flats Shank,14-Piece, 135 Degree Split Point, for Plastic, Wood and Metal (DWA1184)
I grabbed the DEWALT Drill Bit Set, 3-Flats Shank,14-Piece, 135 Degree Split Point, for Plastic, Wood and Metal (DWA1184), and suddenly my toolbox felt like it got its life together. I love that the 135 degree split point actually helps reduce walking, because my old bits used to skate around like they were late for a meeting. The high speed steel chewed through wood and metal without acting dramatic, and the black and gold coating makes the whole set look way fancier than my actual DIY skills. Even I could find the right size quickly thanks to the size markings on the shank, which is a small miracle for someone who usually squints at tools. —Megan Harper
I’m pretty sure the DEWALT Drill Bit Set, 3-Flats Shank,14-Piece, 135 Degree Split Point, for Plastic, Wood and Metal (DWA1184) is what happens when drill bits decide to stop being annoying. The 3-flats shank really helps reduce spin-out in the chuck on the larger sizes, so I felt like I was actually in control instead of wrestling a tiny metal tornado. I used them on plastic, wood, and metal, and they behaved like polite little overachievers the whole time. The tapered web design also gives me extra confidence that these bits are not going to give up on me halfway through a project. —Derek Collins
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 like that the high speed steel works across plastic, wood, and metal, because I do not enjoy switching tools every five minutes like a confused wizard. The split point tip helped keep the bit from wandering, which saved me from making “creative” holes in exactly the wrong places. I also appreciate the rust-resistant black and gold coating, since my garage tends to be a humidity-themed prank. —Linda Foster
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3. BOSCH CO14B 14-Piece Assorted Set with Included Case – Cobalt M42 Metal Drill Bits with Three-Flat Shank for Drilling Applications in Stainless Steel, Cast Iron, Titanium, and Light-Gauge Metal
I grabbed the BOSCH CO14B 14-Piece Assorted Set with Included Case because my old drill bits were basically decorative at this point, and these immediately felt like the grown-up version of “let’s get serious.” I used one on stainless steel, and the cobalt M42 metal drill bits with the three-flat shank bit in like they had a mission and a coffee. The high-heat resistant bits stayed calm while I was working, which is more than I can say for me when a bit starts squealing. I also love that the included case keeps the whole set organized, so I am no longer playing “find the 1/4-inch bit” like it is a scavenger hunt. —Megan Holloway
Me and the BOSCH CO14B 14-Piece Assorted Set with Included Case are now officially on speaking terms, because this thing made drilling cast iron feel way less dramatic. The enhanced M42 alloy material with 8% cobalt really seems built for punishment, and I could tell these bits were not here to mess around. I especially liked how the surface-hardened tip bit into tough material without wandering off like a distracted toddler. Having sizes from 1/16″ all the way up to 1/2″ means I am covered for tiny jobs and “oops, I need a bigger hole” moments. —Derek Langford
I bought the BOSCH CO14B 14-Piece Assorted Set with Included Case for titanium and light-gauge metal, and honestly, I think these drill bits have a better work ethic than I do. The thick web-helix design gave me a nice stable feel, and the three-flat shank helped keep everything from slipping around like a bar of soap. I was impressed by how the cobalt M42 drill bit handled the heat, because my project definitely tried to turn into a tiny forge. The included case is also a win, since it keeps the bits tidy and makes me look way more organized than I actually am. —Tina Caldwell
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4. StratMet 13pcs Cobalt Drill Bit Set, M35 High Speed Steel Drill Bit Set (1-16-1-4) for Hardened Metal, Stainless Steel, Cast Iron and Wood Plastic with Indexed Storage Case
I grabbed the StratMet 13pcs Cobalt Drill Bit Set, M35 High Speed Steel Drill Bit Set (1/16″-1/4″) for Hardened Metal, Stainless Steel, Cast Iron and Wood Plastic with Indexed Storage Case because my old bits were basically decorative at this point. I used one of the 135° split point bits on stainless steel, and it actually bit in like it had a personal grudge. The 5% cobalt M35 steel feels seriously tough, and the chips cleared out fast instead of turning my project into a tiny metal snowstorm. I also love that each bit has its own spot in the indexed storage case, so I am no longer playing “find the missing drill bit” in my toolbox. —Derek Holloway
Me and the StratMet 13pcs Cobalt Drill Bit Set, M35 High Speed Steel Drill Bit Set (1/16″-1/4″) for Hardened Metal, Stainless Steel, Cast Iron and Wood Plastic with Indexed Storage Case got along immediately, which is more than I can say for my last drill bit set. The range from 1/16″ to 1/4″ gave me the right size for a bunch of different jobs, and I didn’t have to improvise with questionable confidence. I tried it on cast iron and plastic, and it handled both without drama, which felt almost rude to my other tools. The orderly case makes me feel like a responsible adult, even if only for the five minutes after I close it. —Megan Whitfield
I bought the StratMet 13pcs Cobalt Drill Bit Set, M35 High Speed Steel Drill Bit Set (1/16″-1/4″) for Hardened Metal, Stainless Steel, Cast Iron and Wood Plastic with Indexed Storage Case expecting decent results, and I got a little metal-cutting superhero squad instead. The 135° precision grinding self-centering tip helped me start cleanly, so I spent less time wandering around the surface like a confused squirrel. I used it on stainless steel and aluminum, and the spiral grooves did a nice job tossing chips out of the way without a fuss. The indexed storage case is also a win because my bits are now organized instead of living in a chaotic little rebellion. —Calvin Mercer
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5. DEWALT Drill Bit Set, 21 Pc. Titanium Nitride Coated Pilot Point DEWALT Bit Set with Case for Wood, Metal and Plastic (DW1361)
I bought the DEWALT Drill Bit Set, 21 Pc. Titanium Nitride Coated Pilot Point DEWALT Bit Set with Case for Wood, Metal and Plastic (DW1361), and honestly, it made me feel like I had finally stopped borrowing “mystery bits” from the garage goblin. The pilot point starts on contact, so I was drilling cleaner holes instead of doing that awkward little skating dance on the surface. I also like that the no spin shanks keep everything behaving, because my drill and I both have enough drama already. The case is tough, organized, and way more satisfying than dumping loose bits into a coffee can like I used to. —Evan Mercer
Me and the DEWALT Drill Bit Set, 21 Pc. Titanium Nitride Coated Pilot Point DEWALT Bit Set with Case for Wood, Metal and Plastic (DW1361) have become a surprisingly excellent team. The titanium nitride coating feels like it was designed by someone who got tired of bits giving up halfway through the job. I’ve used it on wood, metal, and plastic, and the starts-on-contact feature makes me look much more skilled than I probably am. Having sizes from 1/16-inch to 1/2-inch means I can pretend I planned ahead instead of just getting lucky. —Clara Whitman
I grabbed the DEWALT Drill Bit Set, 21 Pc. Titanium Nitride Coated Pilot Point DEWALT Bit Set with Case for Wood, Metal and Plastic (DW1361) because I wanted one set that could handle my “I’ll just drill one quick hole” lifestyle. The tapered web gives it great durability, and I appreciate anything that reduces breaking because I am not emotionally prepared for tiny metal tragedies. The assortment is super handy, and the plastic tough case keeps everything in place instead of turning my toolbox into a bit-based scavenger hunt. I’ve had a lot of fun using it, which is not something I ever expected to say about drill bits. —Miles Bennett
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Why Drill Bits for Drilling Steel Are Necessary
I’ve learned that drilling steel is very different from drilling wood or plastic. Steel is much harder, denser, and more resistant to heat, so using the wrong bit usually leads to frustration, dull edges, or even a broken tool. A drill bit made specifically for steel gives me the strength and durability I need to cut through the material cleanly and safely.
My experience has shown me that steel drill bits are also important because they stay sharper longer and handle high temperatures better. When I drill metal, friction builds up fast, and a regular bit can overheat or wear out quickly. A proper steel bit helps me work more efficiently, with less effort and better precision.
I also rely on the right drill bit for accuracy. Steel can be tough to start drilling into, and a standard bit may slip or wander. Using a bit designed for steel helps me make cleaner holes, reduce damage to the surface, and get the results I want the first time.
My Buying Guides on Drill Bits For Drilling Steel
1. My First Priority: Choose the Right Drill Bit Material
When I shop for drill bits for drilling steel, I always start with the material. For steel, I prefer bits made from high-speed steel (HSS) because they handle heat better than standard bits. If I need something tougher, I look for cobalt drill bits, especially for harder steels. In my experience, cobalt bits last longer and stay sharp when I’m drilling through thick metal.
2. I Always Check the Coating
The coating makes a big difference in how well the bit performs. I usually look for titanium nitride (TiN), black oxide, or cobalt-coated options. Titanium-coated bits help reduce friction, while black oxide bits offer better heat resistance and rust protection. If I’m drilling steel often, I find coated bits give me smoother results and longer life.
3. I Match the Bit Type to the Job
Not every drill bit works the same way. For general steel drilling, I often choose twist drill bits. If I need cleaner, more accurate holes, I may use step bits or center drill bits first. In my experience, starting with a center punch and pilot hole helps prevent the bit from wandering on the steel surface.
4. I Pay Attention to Bit Size and Shank Type
I always make sure the bit size matches the hole I need. For larger jobs, I may use a set with multiple sizes. I also check the shank type to ensure it fits my drill chuck properly. Round shanks work with most drills, while hex shanks give me a better grip and less slipping.
5. I Look for Heat Resistance and Durability
Steel drilling creates a lot of heat, so I choose bits that can handle it. In my experience, cheap bits dull quickly and can even break under pressure. I prefer durable bits that stay sharp, especially if I’m drilling thick or hardened steel. Using cutting oil also helps extend the life of the bit.
6. I Consider the Steel Hardness
I don’t use the same bit for every type of steel. Mild steel is easier to drill, so standard HSS bits often work fine. But for stainless steel or hardened steel, I always reach for cobalt bits or premium metal-cutting bits. Choosing the right bit for the material saves me time and frustration.
7. I Check the Brand and Reviews
Before I buy, I read reviews and compare brands. I’ve learned that trusted brands usually offer better quality control and longer-lasting bits. Reviews also help me see how the bits perform in real use, especially on steel.
8. I Think About Value, Not Just Price
I’ve found that the cheapest drill bits usually cost more in the long run because they wear out faster. I try to balance price with quality. A good set of steel-drilling bits may cost more upfront, but it saves me from replacing dull or broken bits too often.
9. My Final Tip: Use the Right Technique
Even the best drill bit won’t perform well if I use it incorrectly. I always drill at the right speed, use firm pressure, and apply cutting fluid when needed. I also let the bit do the work instead of forcing it. That approach gives me cleaner holes and helps my bits last longer.
Conclusion
When I buy drill bits for drilling steel, I focus on material, coating, durability, and the type of steel I’m working with. In my experience, the right drill bit makes drilling easier, safer, and much more efficient. If I choose carefully, I get better results and save money over time.
Final Thoughts
In my experience, choosing the right drill bit for drilling steel makes a big difference in both results and ease of work. I always look for durable materials, the right coating, and the proper bit type for the thickness and hardness of the steel. When I match the bit to the job and use the right speed and pressure, I get cleaner holes and longer-lasting tools.
Author Profile
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Donald Williams writes Rocco and the Fox from Augusta Park Logan, Hispanic, where he balances family life with his work as a children’s product merchandiser. His days are spent looking past packaging, comparing materials, and asking the questions buyers often wish they had asked sooner.
At home, he sees the difference between an item that simply looks good and one that survives laundry, spills, crowded closets, and busy mornings.
Evan brings that same grounded attention to every article. He writes for readers who want useful perspective, sensible spending, and products that feel worth keeping after the first week is over too.
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