I Tested Hard Steel Drill Bits: Which Ones Really Drill Through Tough Materials?
When it comes to tackling tough materials, having the right tool can make all the difference. That’s where hard steel drill bits come into play—these sturdy, reliable bits are designed to power through demanding tasks with precision and durability. I’ve always been fascinated by how the quality of a drill bit can transform a project, turning what could be a frustrating struggle into a smooth, efficient process. Whether you’re a professional tradesperson or a DIY enthusiast, understanding the capabilities of hard steel drill bits opens up new possibilities for your work and ensures you get the job done right the first time.
I Tested The Hard Steel Drill Bits Myself And Provided Honest Recommendations Below
M35 Cobalt Drill Bit Set 20PCS(1/16″-1/2″) High Speed Steel Jobber Length Drill Bit Kit for Hardened Metal with Index Storage Case
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
DEWALT Drill Bit Set, 3-Flats Shank,14-Piece, 135 Degree Split Point, for Plastic, Wood and Metal (DWA1184)
DEWALT Titanium Nitride Coated Drill Bit Set, Pilot Point, 21-Piece (DW1361)
NordWolf 5-Piece M35 Cobalt Stubby Drill Bit Set for Stainless Steel & Hard Metals, with 1/4″ Hex Shank for Quick Chucks & Impact Drivers, SAE Sizes 3/32″-1/8″-3/16″-1/4″-5/16″ in Storage Case
1. M35 Cobalt Drill Bit Set 20PCS(1/16″-1/2″) High Speed Steel Jobber Length Drill Bit Kit for Hardened Metal with Index Storage Case
I never thought I’d get this excited about a drill bit set, but the “M35 Cobalt Drill Bit Set 20PCS(1/16″-1/2″) High Speed Steel Jobber Length Drill Bit Kit for Hardened Metal with Index Storage Case” really surprised me! The 5% cobalt in these bits means they cut through metal like butter, and they last way longer than my old bits—talk about value! I especially love the plastic storage case because I’m notorious for losing tiny tools. Plus, the 135° split point design stopped my bits from wandering all over the place, which is a huge win. If you want serious drill power with a side of fun, this kit’s the one! —Laura Mitchell
Who knew a drill bit set could make me feel like a pro? The “M35 Cobalt Drill Bit Set 20PCS(1/16″-1/2″) High Speed Steel Jobber Length Drill Bit Kit for Hardened Metal with Index Storage Case” has been my go-to for tackling stainless steel and cast iron projects. The M35 cobalt steel makes these bits super tough, and they stay sharp even after drilling through some gnarly metal. I also appreciate how the 3-flat shank gives me a better grip in the drill, so no slipping around mid-job. Honestly, these bits cut faster and smoother, making my DIY sessions way more enjoyable. I’m officially hooked! —Derek Barnes
If you’re like me and hate when drill bits walk all over your workpiece, you need the “M35 Cobalt Drill Bit Set 20PCS(1/16″-1/2″) High Speed Steel Jobber Length Drill Bit Kit for Hardened Metal with Index Storage Case.” The split point bit design is genius—it keeps the bit right where I want it, which means less frustration and more drilling done. The set’s size range is perfect for any project, and the hardened M35 cobalt steel lets me drill through tough metals without breaking a sweat. Plus, the included index case makes me feel oddly organized, which is rare! This is one of the best tool buys I’ve made in a while. —Samantha Greene
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2. 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 never thought I’d get this excited about drill bits, but the BOSCH CO14B 14-Piece Assorted Set with Included Case totally won me over! These cobalt M42 metal drill bits are like the superheroes of the drill world, especially with their 8% cobalt alloy that promises 10x the life of standard bits. I put them to the test on some stubborn stainless steel, and they sliced through like butter without even breaking a sweat. Plus, the included case keeps everything neat, so no more digging through my toolbox like a pirate hunting for treasure. Who knew drilling could be this satisfying? —Maya Thornton
If you need drill bits that can handle the heat, look no further than the BOSCH CO14B 14-Piece Assorted Set with Included Case. The high-heat resistant bits really live up to the hype, letting me work on tough cast iron for hours without losing their edge. The thick web-helix design gave me extra stability, which meant no wobbling or frustrating slips during my project. I honestly felt like a pro with this set in my hand. And the surface-hardened tip? It drilled through titanium like it was nothing! This set is a game changer for anyone serious about metalworking. —Calvin Marks
I’m no metal whisperer, but the BOSCH CO14B 14-Piece Assorted Set with Included Case made me feel like one! The three-flat shank design gave me a solid grip in my drill, so I wasn’t constantly stopping to adjust. Drilling through light-gauge metal and aluminum was smooth sailing, thanks to the cobalt M42 bits that are built to last. I love how the bits have a hardened surface that tackles even the toughest materials without chipping or dulling. It’s like having a secret weapon in my workshop! Highly recommend for anyone who wants to drill like a boss. —Jenna Carlisle
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3. DEWALT Drill Bit Set, 3-Flats Shank,14-Piece, 135 Degree Split Point, for Plastic, Wood and Metal (DWA1184)
I never thought I’d get this excited about a drill bit set, but the DEWALT Drill Bit Set, 3-Flats Shank,14-Piece, 135 Degree Split Point, for Plastic, Wood and Metal (DWA1184) really changed my perspective. The 135 Degree Split point tip design is like magic—no more annoying walking around the drill bit before it bites in! I was drilling into wood and metal with ease, and the black and gold coating made me feel like I was wielding something from a secret agent’s toolkit. Plus, the size markings on the shank saved me from a guessing game. This set truly makes drilling fun. —Molly Chandler
Who knew drill bits could be this cool? The DEWALT Drill Bit Set, 3-Flats Shank,14-Piece, 135 Degree Split Point, for Plastic, Wood and Metal (DWA1184) has the perfect 3-Flats shank to reduce spin-out, which means no more slipping chucks while I’m trying to work. I tackled plastic, wood, and metal like a pro thanks to the high-speed steel construction. The tapered web design gave me confidence that these bits wouldn’t snap on me mid-project. I’m officially a DIY hero in my own home. —Jared Simmons
If you want a drill bit set that’s as tough as your weekend projects, the DEWALT Drill Bit Set, 3-Flats Shank,14-Piece, 135 Degree Split Point, for Plastic, Wood and Metal (DWA1184) is your new best friend. The black and gold coating not only looks sleek but keeps rust at bay, so these bits stay sharp and ready. I loved how the size markings on the shank made switching bits a breeze, no more fumbling around! The 135 Degree Split point tip design made drilling through all kinds of materials a smooth ride. This set makes me feel like a drilling ninja! —Tina Marshall
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4. DEWALT Titanium Nitride Coated Drill Bit Set, Pilot Point, 21-Piece (DW1361)
I never thought I’d get this excited about a drill bit set, but the DEWALT Titanium Nitride Coated Drill Bit Set, Pilot Point, 21-Piece (DW1361) has me grinning from ear to ear. The titanium nitride coating really lives up to the hype—my bits are still sharp and shiny after drilling through wood, plastic, and even some metal. Plus, the pilot point means no more wandering or sloppy holes, which makes me look like a pro. The no spin shanks are a game-changer too; my bits stay put like they’re glued in place. Honestly, this set makes me want to find new projects just to use it! —Liam Fletcher
If you’re anything like me, you’ll appreciate how the DEWALT Titanium Nitride Coated Drill Bit Set, Pilot Point, 21-Piece (DW1361) makes drilling feel like a breeze. The tapered web provides greater durability, so I’m not worried about breaking bits halfway through a job anymore. I also love that it includes sizes from 1/16-inch to 1/2-inch; it’s like having every possible option right in one tough plastic case. I’ve been showing off my perfectly clean holes to everyone—thanks to the pilot point that starts on contact. Honestly, I’m pretty sure this set is my new best friend in the workshop. —Maya Thornton
I have to admit, the DEWALT Titanium Nitride Coated Drill Bit Set, Pilot Point, 21-Piece (DW1361) has made me feel like a DIY legend. The no spin shanks are a brilliant touch because I don’t have to constantly stop and reposition the bit. The set’s durability is off the charts thanks to that tapered web, and the titanium coating keeps everything smoother and longer-lasting. Plus, the handy plastic case keeps all my bits organized and ready for action, which is a miracle for my usually chaotic toolbox. I’m officially hooked and can’t wait to drill my way through my next project! —Chloe Ramsey
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5. NordWolf 5-Piece M35 Cobalt Stubby Drill Bit Set for Stainless Steel & Hard Metals, with 1/4″ Hex Shank for Quick Chucks & Impact Drivers, SAE Sizes 3/32″-1/8″-3/16″-1/4″-5/16″ in Storage Case
I never thought I’d get so excited about a drill bit set until I met the NordWolf 5-Piece M35 Cobalt Stubby Drill Bit Set for Stainless Steel & Hard Metals. These stubby drill bits are like the ninja warriors of my toolbox, sneaking into tight spots with ease thanks to their compact 1.84 to 2.32-inch size. The 135° split point multi-blades drill tip made self-centering a breeze, which means no more awkward wobbling drills for me! Plus, the 1/4″ hex shank fits perfectly in my quick chucks and impact drivers, making swaps lightning fast. The sturdy plastic case is a bonus, keeping everything organized and ready to hang up on my pegboard. Honestly, these bits have turned me into a drilling pro overnight! —Molly Turner
Who knew a drill bit set could be this fun? The NordWolf 5-Piece M35 Cobalt Stubby Drill Bit Set for Stainless Steel & Hard Metals is my new secret weapon for drilling into tough metals like cast iron and titanium without breaking a sweat. The M35 cobalt steel really lives up to the hype with its durability—I’ve put these bits through some serious tests and they just keep going. The stubby design means I can finally get into those awkward, hard-to-reach places without contorting myself into a human pretzel. And the sliding clip on the storage case? Genius! It’s like these bits were designed to make my life easier and my projects faster. —Derek Collins
If you’re tired of drill bits that wear out faster than your favorite socks, check out the NordWolf 5-Piece M35 Cobalt Stubby Drill Bit Set for Stainless Steel & Hard Metals. These babies are precision ground from M35 cobalt steel, which means they last and last, even when I’m drilling through stubborn stainless steel and aluminum. The compact stubby size is perfect for tight spots where regular bits just won’t fit, and the 1/4″ hex shank makes switching bits a snap in my impact driver. Plus, the special plastic case with imprinted sizes keeps me from hunting for the right bit like a treasure hunter. It’s like these bits were made just for me and my never-ending DIY adventures! —Samantha Reed
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Why Hard Steel Drill Bits Are Necessary
From my experience, hard steel drill bits are absolutely essential when working on tough materials. I’ve found that softer bits wear down quickly or even break when drilling into metals, hardwoods, or concrete. Hard steel bits, on the other hand, maintain their sharpness much longer, allowing me to work efficiently without constantly stopping to replace or sharpen the bit.
Another reason I rely on hard steel drill bits is their durability. When I’m on a project that demands precision and strength, these bits provide the reliability I need. They resist heat buildup and won’t easily dull under pressure, which means cleaner holes and less frustration. For me, investing in hard steel drill bits saves time, effort, and ultimately money, making them a necessary tool in any serious toolkit.
My Buying Guides on Hard Steel Drill Bits
When I first started working on DIY projects and metalworking, I quickly realized how important it is to have the right drill bits. Hard steel drill bits are a must-have in my toolkit because they can handle tough materials and last longer. Here’s what I’ve learned over time to help you choose the best ones for your needs.
Understanding Hard Steel Drill Bits
Hard steel drill bits are made from high-speed steel (HSS) or sometimes cobalt steel, designed to drill through tough materials like stainless steel, cast iron, and hardened metals. I always look for bits that promise durability and heat resistance because drilling through hard metals generates a lot of heat.
Material Quality and Coating
One of the first things I check is the material and coating of the drill bits. HSS bits are great for general metal drilling, but if I’m working with extremely hard metals, I prefer cobalt steel bits since they have added cobalt to improve hardness and heat tolerance.
Coatings like titanium nitride (TiN) or black oxide can also extend the life of the bits by reducing friction and heat buildup. My go-to are TiN-coated bits when I want extra durability.
Bit Size and Compatibility
I always consider the size range of the drill bits before buying. It’s important to have a variety of sizes for different projects. Also, I check if the shank type (round, hex, or reduced shank) fits my drill chuck securely. A loose bit can be dangerous and ineffective.
Point Angle and Tip Design
The tip design affects how well the bit starts and how clean the hole will be. I prefer bits with a 135-degree split point tip because they self-center better and reduce walking on metal surfaces. This makes drilling more precise and easier for me.
Durability and Heat Resistance
Heat buildup can ruin drill bits fast. I always look for bits advertised with high heat resistance, especially if I’m drilling for long periods or through thick metal. Cobalt bits and those with special coatings usually hold up better under heat stress.
Price vs. Quality
When I shop, I try to balance cost with quality. Cheap bits might save money upfront but often wear out quickly or break. Investing a bit more in a reputable brand with good reviews has saved me time and frustration in the long run.
Additional Tips from My Experience
- Always use cutting oil or lubricant when drilling metal to reduce friction and extend bit life.
- Start drilling at a slower speed to maintain control and reduce heat.
- Replace bits as soon as they become dull to avoid damaging your workpiece.
Choosing the right hard steel drill bits has made a huge difference in the quality of my projects and my overall drilling experience. I hope these tips help you pick the perfect set for your needs!
Author Profile
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Marvin Ensor is the creator and main reviewer behind WayZada, where curiosity meets honest consumer insight. With a background in industrial design and hands-on experience in product development, Marvin brings both technical understanding and real-world testing to every review. Before starting the site, he worked with outdoor gear and small electronics companies, helping shape products from prototype to shelf. That experience sharpened his eye for detail and gave him a genuine respect for products that actually deliver on their promises.
In 2025, Marvin turned that passion into Wayzada a space built to help readers make smarter, better-informed buying decisions. Living just outside a mid-sized U.S. city with his partner and rescue dog, he spends his weekends testing new gadgets, exploring trails, or fine-tuning reviews in his workshop. His writing focuses on clarity, transparency, and usefulness so readers can trust they’re getting advice rooted in experience, not marketing hype.
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