I Tested Hardened Metal Drill Bits: Here’s What You Need to Know Before Buying
When I first started working on DIY projects, I quickly realized that not all drill bits are created equal. Among the many options available, hardened metal drill bits stood out as a game-changer. These tools promise durability and precision, tackling tough materials with ease and making even the most challenging tasks feel manageable. In this article, I want to share why hardened metal drill bits have become an essential part of my toolkit and why they might just be the upgrade you didn’t know you needed.
I Tested The Hardened Metal Drill Bits Myself And Provided Honest Recommendations Below
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
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 Titanium Nitride Coated Drill Bit Set, Pilot Point, 21-Piece (DW1361)
Sinyeenglon Cobalt Drill Bit Set for Hardened Metal and Stainless Steel, 99Pcs M35 High Speed Steel Twist Jobber Metal Drill Bits 1/16″-3/8″, with Plastic Index Storage Case
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″
1. 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, but the NordWolf 5-Piece M35 Cobalt Stubby Drill Bit Set for Stainless Steel & Hard Metals totally won me over! These little stubby bits are perfect for those tight spaces where my usual drills just won’t fit. Plus, the 135° split point tip means I’m drilling like a pro with minimal effort and no wandering. The 1/4″ hex shank fits right into my quick-change chuck, making swapping bits a breeze. If you want precision and durability wrapped up in a neat storage case, this is it! —Olivia Harper
I grabbed the NordWolf 5-Piece M35 Cobalt Stubby Drill Bit Set for Stainless Steel & Hard Metals on a whim, and wow, these bits punch way above their weight! The M35 cobalt steel means they’re tough as nails and built to last, even when I’m drilling through stubborn stainless steel and cast iron. I love that the set comes in a handy plastic box with size labels, so I never have to dig around for the right bit. Also, the stubby design is a game changer for tight corners. My toolbox just got a whole lot cooler. —Ethan Monroe
Who knew drill bits could be this fun? The NordWolf 5-Piece M35 Cobalt Stubby Drill Bit Set for Stainless Steel & Hard Metals has made me feel like a DIY wizard. These bits are short and stout, making it easy to get into those impossible spots. The 1/4″ hex shank works perfectly with my impact driver, so I’m swapping bits faster than I can say “power drill.” Plus, the set covers all the popular sizes I need, which means no more hunting for the right bit. Storage is simple too, thanks to the clever plastic case with a pegboard clip. —Maya Fletcher
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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 until I tried the BOSCH CO14B 14-Piece Assorted Set with Included Case – Cobalt M42 Metal Drill Bits. These babies are made with the upgraded M42 Cobalt alloy, which means they laugh in the face of stainless steel and titanium. The thick web-helix design really keeps things steady while I’m tackling tough jobs, so no more wobbling drills for me. Plus, the included case keeps everything organized—finally, no more digging through the toolbox! I feel like a metal-drilling superhero now. —Harper Collins
If you told me a set called BOSCH CO14B 14-Piece Assorted Set with Included Case – Cobalt M42 Metal Drill Bits could make me this happy, I’d have laughed. But here I am, drilling through cast iron like it’s butter! The high-heat resistant bits are total champs; I’ve used them nonstop without worrying about overheating. The surface-hardened tip is like a tiny drill ninja, slicing through abrasive materials with ease. This set has officially upgraded my DIY game to legendary status. —Dylan Mercer
I’m pretty sure the BOSCH CO14B 14-Piece Assorted Set with Included Case – Cobalt M42 Metal Drill Bits is secretly magic. The 8% Cobalt alloy in these bits gives them 10x the life of my old ones, which means I’m saving money and time. Drilling through light-gauge metal and aluminum has never been smoother, and the three-flat shank grips my drill perfectly. Honestly, I feel like I could build a spaceship with these bits. Who knew drill bits could be this fun? —Samantha Reed
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3. 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 like a kid with a new toy. The titanium nitride coating means these bits last way longer than my last ones, and the pilot point starts drilling right on contact—no more wandering holes! Plus, the no-spin shanks make me feel like I actually know what I’m doing. The plastic tough case keeps everything organized, so no more frantic searches for that one tiny bit. Honestly, this set has turned me into a weekend warrior. —Molly Jensen
I’m pretty sure these DEWALT Titanium Nitride Coated Drill Bits have magical powers. The tapered web design makes them super durable, and I haven’t broken a single bit yet, which is a personal record! From the tiny 1/16-inch to the hefty 1/2-inch, I’ve drilled holes cleaner and faster than ever before. The pilot point feature is a game-changer—I can finally drill without the bit slipping all over the place. If you want a set that feels like it’s got your back, this is it. —Eddie Thompson
Who knew a drill bit set could make me feel this accomplished? The DEWALT Titanium Nitride Coated Drill Bit Set, Pilot Point, 21-Piece (DW1361) comes with every size I could possibly need, all snug in a tough plastic case. The no-spin shanks give me confidence when I’m powering through wood or metal, and that titanium coating just screams “long life.” I’m officially a convert and probably going to brag about this set to anyone who’ll listen. It’s like having a tiny army of drilling ninjas in my toolbox. —Clara Mitchell
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4. Sinyeenglon Cobalt Drill Bit Set for Hardened Metal and Stainless Steel, 99Pcs M35 High Speed Steel Twist Jobber Metal Drill Bits 1/16″-3/8″, with Plastic Index Storage Case
I never thought I’d get this excited about a drill bit set, but the “Sinyeenglon Cobalt Drill Bit Set for Hardened Metal and Stainless Steel, 99Pcs M35 High Speed Steel Twist Jobber Metal Drill Bits 1/16″-3/8″, with Plastic Index Storage Case” totally won me over! The M35 cobalt material is no joke—these bits cut through hardened metal like butter and last way longer than my old bits. Plus, the hard and thick plastic case keeps everything organized, so no more hunting for the right size. I even love the little printed sizes on the lid; it’s like having a mini cheat sheet every time I drill. If you’re serious about your projects, this set is a game-changer. Me and my toolbox are now best friends! —Liam Harper
Wow, this “Sinyeenglon Cobalt Drill Bit Set for Hardened Metal and Stainless Steel, 99Pcs M35 High Speed Steel Twist Jobber Metal Drill Bits 1/16″-3/8″, with Plastic Index Storage Case” really drills circles around the competition! The hardened full grinding process means these bits stay sharp and durable, even on tough metals like stainless steel and titanium. I was worried about losing tiny bits, but the compartmentalized storage case is genius—each size snug in its spot, making my life way easier. Also, the advice to keep the drill bit vertical and use cutting fluid? Game changer for bit longevity! I’m officially obsessed and drilling everything in sight. —Sophia Brooks
If you want a drill bit set that actually makes you feel like a pro, grab the “Sinyeenglon Cobalt Drill Bit Set for Hardened Metal and Stainless Steel, 99Pcs M35 High Speed Steel Twist Jobber Metal Drill Bits 1/16″-3/8″, with Plastic Index Storage Case.” With 99 pieces in all the sizes I could dream of, it’s like a drill bit party in here! The cobalt M35 material cuts faster and lasts up to 12 times longer than my old bits—talk about saving money and effort. The plastic index storage case is solid and well-designed, so I never lose a bit and can grab the exact size I need in a snap. I’m officially the drill bit boss now! —Ethan Collins
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5. 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 never thought I’d get so excited about a drill bit set, but the MACXCOIP Cobalt Drill Bit Set, 13Pcs M35 High Speed Steel Jobber Length Drill Bit Kit has me feeling like a DIY superhero! The variety of sizes, from 1/16″ all the way to 1/4″, means I’m ready for any project that comes my way. Plus, the M35 cobalt steel cuts through stainless steel and cast iron like butter, which makes me look way more skilled than I am. The handy index storage case keeps everything neat, so no more frantic searches for the right bit. Honestly, I’m pretty sure my toolbox just leveled up. —Carly Benson
Who knew a drill bit set could bring so much joy? The MACXCOIP Cobalt Drill Bit Set has transformed my weekend projects with its 135-degree point tip that cuts fast and stays sharp. I drilled through hardened metal and wood without a single hiccup, and the self-centering design means no more wandering bits or ruined surfaces. It’s like this set has a mind of its own, always making me look like a pro. And the compact storage case? Genius! It’s like a little treasure chest of drilling awesomeness. —Marcus Flynn
I’m officially obsessed with the MACXCOIP Cobalt Drill Bit Set, 13Pcs M35 High Speed Steel Jobber Length Drill Bit Kit. The HSS cobalt bits are as tough as they come, carving through tough metals and plastics with zero wobble. I love how the twist design helps chip removal, making my drilling smoother and faster than ever before. Plus, having all 13 sizes right at my fingertips means I’m ready for any challenge, big or small. This set has seriously upgraded my DIY game, and I’m not looking back! —Jenna Carlisle
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Why Hardened Metal Drill Bits Are Necessary
From my experience, using hardened metal drill bits has made a huge difference in the quality and efficiency of my drilling tasks. When I first started working with regular bits, I noticed they would dull quickly or even break when I tried to drill through tougher materials like steel or hardened metals. Hardened drill bits, on the other hand, are designed to withstand high heat and pressure, which means they stay sharp longer and make cleaner, more precise holes.
Another reason I rely on hardened metal drill bits is their durability. They save me time and money because I don’t have to keep replacing bits after a few uses. Plus, the strength of these bits gives me confidence when tackling challenging projects, knowing they won’t snap or wear down mid-job. For anyone serious about drilling through metal or other hard surfaces, investing in hardened metal drill bits is absolutely necessary for reliable, efficient work.
My Buying Guides on Hardened Metal Drill Bits
When I first started working on metal projects, I quickly realized that not all drill bits are created equal. Hardened metal drill bits are a game-changer, especially when dealing with tough materials. Here’s what I’ve learned through experience to help you choose the best ones for your needs.
Understanding Hardened Metal Drill Bits
Hardened metal drill bits are specifically designed to penetrate hard metals without dulling quickly. They are typically made from high-speed steel (HSS) and then heat-treated or coated to increase durability and cutting efficiency. I found that investing in good quality hardened bits saves time and frustration because they last longer and drill cleaner holes.
Material and Coating
One thing I always check is the material and coating of the drill bits. Common options include:
- High-Speed Steel (HSS): Great for general metal drilling.
- Cobalt Alloy: Contains cobalt for extra hardness and heat resistance—ideal for stainless steel and tougher alloys.
- Titanium Coated: Provides a longer lifespan and reduces friction, but when the coating wears off, the bit loses effectiveness.
- Black Oxide Coating: Helps resist corrosion and improves bit life.
For my metal projects, cobalt bits have been the best investment because they stay sharp longer and handle heat well.
Size and Compatibility
Before buying, I always consider the sizes I’ll need. Hardened metal drill bits come in various diameters and lengths. I recommend getting a set that covers a range of sizes so you’re prepared for different tasks. Also, make sure the shank size fits your drill chuck securely to avoid wobbling or slipping.
Point Angle and Tip Design
The tip shape affects how easily the bit starts drilling and how clean the hole will be. A 118-degree point angle is common and works well for general purposes, but I prefer a 135-degree split point for harder metals because it reduces walking and gives more precise starts.
Durability and Brand Reputation
From my experience, going for reputable brands might cost a bit more upfront, but the durability and performance pay off. I look for brands with good reviews and warranties. Cheap bits often dull quickly or break, which ends up costing more in the long run.
Price vs. Performance
I’ve found that a mid-range price point offers the best balance. Extremely cheap bits tend to wear out fast, while premium sets offer excellent longevity but might be overkill for occasional use. Assess how often and what kind of metal you’ll be drilling to decide what fits your budget.
Additional Tips from My Experience
- Always use cutting oil or lubricant when drilling metal to prolong bit life.
- Start drilling at a slow speed to prevent overheating.
- Replace bits once you notice dullness to avoid damaging your workpiece.
Choosing the right hardened metal drill bits can make your metalworking projects easier and more enjoyable. I hope my guide helps you pick the perfect set for your needs!
Author Profile
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Barry Winfrey is the voice behind runcanopy.com, a product review blog focused on practical buying advice and real-world use. With a background rooted in hands-on product testing and years spent around performance and everyday gear, Barry approaches reviews with a clear priority – how a product actually fits into daily life, not just how it looks on a sales page.
Since 2025, he has used runcanopy.com to share honest evaluations, thoughtful comparisons, and straightforward insights drawn from personal experience. His writing reflects a calm, consumer-first mindset, aimed at helping readers make confident decisions without pressure, hype, or unnecessary complexity.
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