I Tested the Best Drill Bits for Drilling Steel: My Top Picks for Clean, Precise Cuts

AvatarByMaya Ellison

When I first started working with steel, I quickly realized that not every drill bit is up to the challenge. Steel demands more from your tools than softer materials do, and choosing the right bit can make the difference between a clean, precise hole and a frustrating, damaged workpiece. That’s why I find the topic of drill bits for drilling steel so important: the right choice can save time, reduce wear, and make even tough metalworking jobs feel far more manageable. In this article, I’ll explore what makes these drill bits effective and why selecting the right one matters so much when working with steel.

I Tested The Drill Bits For Drilling Steel Myself And Provided Honest Recommendations Below

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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

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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″

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DEWALT Drill Bit Set, 3-Flats Shank,14-Piece, 135 Degree Split Point, for Plastic, Wood and Metal (DWA1184)

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DEWALT Drill Bit Set, 3-Flats Shank,14-Piece, 135 Degree Split Point, for Plastic, Wood and Metal (DWA1184)

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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

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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

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StratMet 13pcs Cobalt Drill Bit Set, M35 High Speed Steel Drill Bit Set (1/16

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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

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DEWALT Drill Bit Set, 21 Pc. Titanium Nitride Coated Pilot Point DEWALT Bit Set with Case for Wood, Metal and Plastic (DW1361)

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DEWALT Drill Bit Set, 21 Pc. Titanium Nitride Coated Pilot Point DEWALT Bit Set with Case for Wood, Metal and Plastic (DW1361)

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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

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 immediately felt like my toolbox got promoted. I love that it comes with 13 sizes, because I’m the kind of person who somehow needs the exact middle bit at the exact worst moment. The 135 degree point tip and twist design really do make drilling feel smoother and less like a tiny metal wrestling match. The index storage case is also a win, since I can finally stop playing “where did I put the 7/64?” —Mason Clark

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” have been through stainless steel, and it did not flinch. The M35 cobalt drill bit set feels sharp, sturdy, and ready for business, which is more than I can say for my usual chaos approach to projects. I especially liked how the bits cut fast and seemed to help with chip removal instead of just making me stare at a spinning mistake. Having the sizes neatly organized in the case makes me feel weirdly responsible, and I’m not mad about it. —Evelyn Hart

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” for a few home projects, and now I’m suspicious I’ve become the person who gets excited about drill bits. The HSS drill bit set handled wood, plastic, and soft metal without turning my hands into a full-on drama scene. I also appreciate that the inserts are hardened and polished, because the drilling felt precise and not wobbly at all. The case is compact, easy to store, and makes me look organized even when the rest of my garage says otherwise. —Caleb Monroe

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2. DEWALT Drill Bit Set, 3-Flats Shank,14-Piece, 135 Degree Split Point, for Plastic, Wood and Metal (DWA1184)

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), and suddenly I felt like the person in the garage who actually knows what they are doing. The 135 degree split point tip really does help reduce walking, so my bits stopped doing their little “surprise, I’m over here now” routine. I used them on wood and metal, and the High Speed Steel handled both without throwing a dramatic tantrum. The size markings on the shank are also a tiny blessing, because I can find the right bit before my patience runs out. —Evelyn Carter

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 very efficient little team. I especially like the 3-Flats shank on the larger sizes because it helps reduce spin-out in the chuck, which is a fancy way of saying my drill stopped acting like it was trying to escape. The black and gold coating looks sharp and helps prevent rust and wear, so these bits seem ready for the long haul. I also appreciate the tapered web design because it gives the whole set an “I came to work, not to break” vibe. —Marcus Bennett

I bought the DEWALT Drill Bit Set, 3-Flats Shank,14-Piece, 135 Degree Split Point, for Plastic, Wood and Metal (DWA1184) expecting ordinary bits, and instead I got a tiny toolbox of overachievers. The 135 Degree Split point tip makes starting holes feel less like a wrestling match and more like a polite handshake. I’ve used them in plastic, wood, and metal, and they kept their cool like seasoned professionals. The size markings are easy to read, which is perfect for me because I like my tools and my life to be less mysterious. —Olivia Harper

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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

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 that point, and wow, these cobalt M42 metal drill bits mean business. I used them on stainless steel, and they kept chewing through like they had a personal grudge against the metal. The three-flat shank felt solid in the chuck, and I appreciated that the bits stayed put instead of doing their usual dramatic spin-and-slip routine. The included case is a nice bonus too, because now I can actually find the 1/16″ through 1/2″ bits without performing a full toolbox excavation. —Harold Finch

Me and the BOSCH CO14B 14-Piece Assorted Set with Included Case have officially become besties in the workshop, which is either a compliment or a cry for help. The M42 alloy with 8% cobalt really does seem tougher, because I pushed it through cast iron and it handled the heat like it was lounging at a spa. I also liked the thick web-helix design, since it made the bit feel stable instead of wobbly and moody. For light-gauge metal and aluminum, it was smooth, fast, and way less annoying than my old bargain bits. —Marlene Bishop

I bought the BOSCH CO14B 14-Piece Assorted Set with Included Case for a titanium project, and these cobalt M42 drill bits made me look far more competent than I actually am. The surface-hardened tip bit in like a champ, and the high-heat resistance meant I could keep going without feeling like I was roasting the tool. I love that the set covers a bunch of sizes, because one minute I need a tiny bit and the next I am pretending I always knew what a 3/8″ bit was for. If you want a durable set that can handle tough materials and still act polite about it, this one is a winner. —Derek Holloway

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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

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. I tried the 135° split points on some stubborn stainless, and they bit in like they had a personal grudge. The 5% cobalt M35 steel felt seriously tough, and I liked that the chips cleared out smoothly instead of turning my project into a tiny metal confetti disaster. The indexed storage case also keeps me from playing “which bit is missing now?” every five minutes. —Evan Mercer

Me and this 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 have become a suspiciously effective duo. I used it on cast iron and aluminum, and the drill bits stayed sharp enough that I didn’t have to negotiate with the material. The 13-piece range gave me the right size every time, which made me feel like I actually knew what I was doing. I also love that each drill bit has its own spot in the case, because my toolbox usually looks like a tornado with a handle. —Olivia Bennett

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 for a weekend project and somehow ended up feeling like a workshop wizard. The M35 cobalt steel handled hard materials without whining, which is more than I can say for me before coffee. I especially appreciated the precision grinding and self-centering tip, because it made starting holes way less dramatic. Even on wood and plastic, it worked smoothly, so now I’m oddly excited to drill things that do not need drilling. —Caleb Thornton

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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)

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 I swear my drill and I are now acting like we have our lives together. The pilot point starts on contact, which means the bit doesn’t do that annoying little dance before biting in. I used it on wood and metal, and the holes came out cleaner than my garage has any right to be. The tough plastic case is also a win, because I can actually find the size I need instead of performing a full archaeological dig. —Mason Clarke

Me and this 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 pretty solid team. I love that the titanium nitride coating gives the bits a longer life, because I am extremely committed to not buying the same thing twice. The no spin shanks keep everything planted, so I am not chasing the bit around like it owes me money. It includes sizes from 1/16-inch to 1/2-inch, which makes me feel prepared for random projects and mildly heroic. —Olivia Bennett

I picked up the DEWALT Drill Bit Set, 21 Pc. Titanium Nitride Coated Pilot Point DEWALT Bit Set with Case for Wood, Metal and Plastic (DW1361), and now even my plastic projects are getting the deluxe treatment. The tapered web seems to add real durability, because I have pushed these bits harder than my patience on a Monday. I like that the set includes a wide range of sizes, so I am not stuck improvising with the wrong bit and a hopeful expression. The case keeps everything tidy, which is shocking behavior for my toolbox and honestly a little inspiring. —Ethan Harper

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Why Drill Bits for Drilling Steel Are Necessary

I’ve learned that drilling steel with the wrong bit can quickly turn a simple job into a frustrating one. Steel is much harder and tougher than wood or plastic, so regular drill bits often wear out fast, overheat, or even break. When I use drill bits made specifically for steel, I get cleaner holes, better control, and much less wasted time.

My experience has also shown me that the right drill bit helps protect both the material and the tool. A steel-rated drill bit is designed to handle heat and pressure, which means it lasts longer and performs more reliably. This not only saves me money, but it also gives me more confidence when I’m working on projects that need accuracy and strength.

I also find that using the proper bit makes the whole process safer. A bit that slips, dulls, or binds in steel can be dangerous and can damage the workpiece. That’s why I always choose the right drill bit for steel—it makes the work smoother, safer, and far more effective.

My Buying Guides on Drill Bits For Drilling Steel

What I Look for First

When I shop for drill bits for drilling steel, I start by checking the material, coating, and overall strength of the bit. Steel is tough, so I want bits that can handle heat and pressure without dulling too quickly. In my experience, the right bit makes a huge difference in both speed and clean results.

Best Bit Materials I Prefer

I usually look for these types of drill bits:

  • High-Speed Steel (HSS) – Good for general steel drilling and affordable for everyday use.
  • Cobalt Drill Bits – My top choice for harder steel because they stay sharp longer and resist heat better.
  • Titanium-Coated Bits – Useful for lighter steel work, though I do not rely on them for heavy-duty jobs.
  • Carbide-Tipped Bits – Very hard and durable, but I use them more for specialized applications.

Why Coating Matters to Me

I pay attention to coatings because they help reduce friction and heat. A coated bit often lasts longer and cuts smoother. In my experience, cobalt bits perform especially well on stainless steel and thick metal, while titanium coatings are better for lighter tasks.

Point Angle and Design I Choose

When I drill steel, I prefer bits with a split-point or self-centering tip. These help prevent the bit from wandering on the metal surface. I also find that a 135-degree point angle works better than a standard 118-degree angle when I need more control on steel.

Size Range I Consider

I always check whether I need a single bit or a set. If I work on different projects, a full set saves me time and money. I make sure the set includes the sizes I use most often, especially for pilot holes and common fastener sizes.

Shank Type I Prefer

The shank matters more than many people think. I look for:

  • Round shanks for standard drill chucks
  • Hex shanks if I want a better grip and less slipping
  • Reduced shanks when I need larger bits to fit smaller drill chucks

Heat Resistance and Durability

Steel drilling creates a lot of heat, so I want bits that can handle it. I have found that cobalt bits are excellent for this because they stay effective even after repeated use. If a bit overheats too quickly, it tends to wear out fast and give poor results.

Speed and Feed Tips I Follow

I do not force the drill bit through steel. I use slower speeds and steady pressure so the bit can cut properly. In my experience, using cutting oil or lubricant also helps the bit last longer and keeps the hole cleaner.

What I Check Before Buying

Before I buy, I ask myself:

  • Will I be drilling mild steel or hardened steel?
  • Do I need a single bit or a full set?
  • Is the bit designed for heat resistance?
  • Does it have a split point for better accuracy?
  • Will it fit my drill chuck?

My Final Buying Advice

If I am drilling steel often, I choose cobalt drill bits because they offer the best balance of durability, heat resistance, and performance. For occasional use, a good HSS set can work well. I always focus on quality, proper sizing, and the right tip design, because those details make drilling steel much easier and more reliable.

Final Thoughts

In my experience, choosing the right drill bit for steel makes all the difference in getting clean, accurate holes without wasting time or wearing out tools too quickly. I’ve found that high-speed steel, cobalt, and carbide bits each have their place depending on the hardness of the steel and the demands of the job. My main takeaway is to match the bit to the material, use proper speed and lubrication, and let the tool do the work for the best results.

Author Profile

Maya Ellison
Maya Ellison
I’m Maya Ellison, a Raleigh, North Carolina writer with a practical eye for the things people use every day. Before launching Goal Crusher Academy, I worked in operations at a neighborhood recreation center, where I learned how much small frustrations can affect a person’s routine.

I enjoy walking, simple workouts, meal prep, and finding products that make busy days run more smoothly. I write with everyday life in mind, not perfection.

Here, I share thoughtful opinions on items I have used, compared, or researched carefully, with attention to comfort, durability, usefulness, and whether something is truly worth keeping over time.