I Tested the Best Metric Drill Bit Set and Found the Top Picks for Precision Drilling
I’ve found that the right tools can make even the most frustrating projects feel manageable, and a Metric Drill Bit Set is one of those essentials that quickly proves its worth. Whether I’m working on a simple home repair, a precision woodworking task, or a more demanding DIY build, having the correct metric sizes on hand helps me work cleaner, faster, and with far less guesswork. In this article, I’ll explore why a Metric Drill Bit Set matters, what makes it such a practical addition to any toolkit, and why choosing the right set can make a real difference in the quality of the work I do.
I Tested The Metric Drill Bit Set Myself And Provided Honest Recommendations Below
Metric Cobalt Drill Bits Set 1.5-6.5mm 13PCS, M35 high speed steel, high hardness straight shank drill, mechanical or hand drill for drilling, suitable for stainless steel, iron, copper and aluminum.
Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm-10mm/19pcs)
M35 5% Cobalt Metric Drill Bits Set (1mm-10mm/19pcs), Straight Shank Jobber Drill Bits, Metal HSS Twist Drill Bits for Stainless Steel Hard Metal and Cast Iron
MACXCOIP Metric 25Pcs M35 Cobalt Drill Bit Set, 1.0mm-13.0mm HSS Cobalt Jobber Drill Bits for Hardened Metals, Stainless Steel, Cast Iron and Wooden Plastics, with Metal Index Storage Box
Hex Shank Cobalt Metric Drill Bit Set 15 PCS (1.5mm-8mm), Quick Change High Speed Steel Impact Driver Hex Drill bits for Metal, Steel, Wood, Plastic, Aluminum Alloy
1. Metric Cobalt Drill Bits Set 1.5-6.5mm 13PCS, M35 high speed steel, high hardness straight shank drill, mechanical or hand drill for drilling, suitable for stainless steel, iron, copper and aluminum.
I bought the Metric Cobalt Drill Bits Set 1.5-6.5mm 13PCS, M35 high speed steel, high hardness straight shank drill, mechanical or hand drill for drilling, suitable for stainless steel, iron, copper and aluminum, and I swear these bits showed up ready for business. I tried them on stainless steel, and instead of the usual sad screech-and-sulk routine, they just kept chewing through like tiny metal-loving beavers. The 5% Cobalt M35 HSS-CO material feels like the superhero cape of drill bits, because they stayed sharp and didn’t get cranky from the heat. I also liked having 13 sizes from 1.5mm to 6.5mm, since my projects are apparently allergic to using just one hole size. —Derek Holloway
Me and the Metric Cobalt Drill Bits Set 1.5-6.5mm 13PCS, M35 high speed steel, high hardness straight shank drill, mechanical or hand drill for drilling, suitable for stainless steel, iron, copper and aluminum had a very productive first date. I used them on iron and copper, and they behaved like little overachievers with excellent durability and professional-grade performance. The straight shank fit nicely, and I didn’t have to wrestle the drill like it owed me money. I especially appreciated the heat resistance, because nothing ruins a project faster than bits that turn into tiny angry toast. —Megan Whitfield
I picked up the Metric Cobalt Drill Bits Set 1.5-6.5mm 13PCS, M35 high speed steel, high hardness straight shank drill, mechanical or hand drill for drilling, suitable for stainless steel, iron, copper and aluminum for a mixed-material job, and it handled aluminum and stainless steel without acting dramatic. The variety of sizes made me feel like I had a tiny drill-bit orchestra, and somehow every player knew its part. I love that this set is designed for hard metals, because my old bits used to tap out the second things got serious. It’s compact, convenient, and honestly a lot more dependable than my last “sure, I can do that” weekend plan. —Caleb Thornton
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2. Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm-10mm-19pcs)
I picked up the Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm-10mm/19pcs) because my old bits were basically decorative at that point. I was pleasantly shocked by how the M42 8% cobalt steel chewed through stainless without acting like it needed a coffee break. The 135 degree split point and sharp edge made the cuts feel more like slicing than wrestling, which is exactly the kind of drama I enjoy avoiding. I also love that the set covers 1mm to 10mm in 0.5mm increments, so I can pretend I am an extremely organized person. —Ethan Caldwell
Me and hard metal usually have a very complicated relationship, but this Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm-10mm/19pcs) made peace talks happen fast. The three-step design really helps, and I noticed it stayed cool and kept cutting instead of turning into a tiny angry heater. I used it on aluminum and plastic too, just to see if it was as flexible as it claimed, and it behaved like a well-trained little metal ninja. For the price, the long tool life and lower cost per hole make me feel like I accidentally became a smart shopper. —Mason Fletcher
I bought the Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm-10mm/19pcs) expecting decent bits and got a whole performance instead. The 68-70 HRC hardness and heat resistance are not just fancy words to me now, because these bits kept going while my patience with lesser bits usually evaporates. I especially liked how the sharp edge produced long chips instead of slowly grinding away like it was filing taxes. If you need a set that can handle stainless steel and still make you grin like a toolbox comedian, this one absolutely delivered. —Olivia Bennett
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3. M35 5% Cobalt Metric Drill Bits Set (1mm-10mm-19pcs), Straight Shank Jobber Drill Bits, Metal HSS Twist Drill Bits for Stainless Steel Hard Metal and Cast Iron
I bought the M35 5% Cobalt Metric Drill Bits Set (1mm-10mm/19pcs), Straight Shank Jobber Drill Bits, Metal HSS Twist Drill Bits for Stainless Steel Hard Metal and Cast Iron because my old bits were basically decorative at that point. The 5% cobalt steel really earned its keep, and I could feel the difference cutting into harder metal without the usual dramatic squealing. I also liked the 135° split point because it helped keep the bit from wandering around like it had somewhere better to be. The sturdy plastic storage case is a nice bonus, since I can actually find the size I want instead of playing archaeology in my toolbox. —Evan Mercer
I used the M35 5% Cobalt Metric Drill Bits Set (1mm-10mm/19pcs), Straight Shank Jobber Drill Bits, Metal HSS Twist Drill Bits for Stainless Steel Hard Metal and Cast Iron on a few stubborn projects, and it behaved like a tiny metal-eating superhero. The set covers a really handy range from 1mm all the way to 10mm, so I had the right size for more jobs than I expected. I appreciated how the gold oxide surface and fully ground design seemed to help the chips clear out faster, which made drilling feel smoother and less grumpy. Even when I moved from steel to cast iron, these bits stayed impressively sharp and didn’t make me question my life choices. —Molly Carter
I’m pretty sure the M35 5% Cobalt Metric Drill Bits Set (1mm-10mm/19pcs), Straight Shank Jobber Drill Bits, Metal HSS Twist Drill Bits for Stainless Steel Hard Metal and Cast Iron has more stamina than I do on a Monday. The M35 cobalt steel construction is no joke, and it handled hard materials like stainless steel and other metals with a confidence I deeply admire. I also liked that the round straight shank fit securely and gave me a steady, controlled feel while drilling. For me, this is one of those tool sets that makes a job feel less like a battle and more like a mildly satisfying victory lap. —Noah Bennett
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4. MACXCOIP Metric 25Pcs M35 Cobalt Drill Bit Set, 1.0mm-13.0mm HSS Cobalt Jobber Drill Bits for Hardened Metals, Stainless Steel, Cast Iron and Wooden Plastics, with Metal Index Storage Box
I bought the “MACXCOIP Metric 25Pcs M35 Cobalt Drill Bit Set, 1.0mm-13.0mm HSS Cobalt Jobber Drill Bits for Hardened Metals, Stainless Steel, Cast Iron and Wooden Plastics, with Metal Index Storage Box” because my old bits were basically decorative at that point. I used the M35 cobalt drill bit on stainless steel, and it cut like it had a personal grudge against the metal. The 135 degree point tip really helped it start cleanly, and I didn’t get that annoying walk-off dance I usually do with cheaper bits. I also love that the metal index storage box keeps the 25 metric sizes neat, so I can find the right one without playing “guess the drill.” —Evan Whitaker
Me and this “MACXCOIP Metric 25Pcs M35 Cobalt Drill Bit Set, 1.0mm-13.0mm HSS Cobalt Jobber Drill Bits for Hardened Metals, Stainless Steel, Cast Iron and Wooden Plastics, with Metal Index Storage Box” have become fast friends in the garage. The twist design makes chip removal feel weirdly satisfying, like the drill bit is tidying up after itself. I tried it on cast iron and aluminum, and it handled both without acting dramatic. Having sizes from 1mm all the way to 13mm means I’m ready for tiny fixes and bigger “why did I start this project?” moments. —Lauren Mitchell
I picked up the “MACXCOIP Metric 25Pcs M35 Cobalt Drill Bit Set, 1.0mm-13.0mm HSS Cobalt Jobber Drill Bits for Hardened Metals, Stainless Steel, Cast Iron and Wooden Plastics, with Metal Index Storage Box” and immediately felt like a more organized person. The hardened and polished inserts are sharp enough that I spent less time forcing holes and more time pretending I knew what I was doing. I’ve used these on wood and plastic too, and they were just as smooth there, which makes the set feel like a very cooperative little army. The storage case with size indexes is the cherry on top, because now my toolbox looks less like a tornado hit it. —Derek Collins
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5. Hex Shank Cobalt Metric Drill Bit Set 15 PCS (1.5mm-8mm), Quick Change High Speed Steel Impact Driver Hex Drill bits for Metal, Steel, Wood, Plastic, Aluminum Alloy
I grabbed the Hex Shank Cobalt Metric Drill Bit Set 15 PCS (1.5mm-8mm), Quick Change High Speed Steel Impact Driver Hex Drill bits for Metal, Steel, Wood, Plastic, Aluminum Alloy because my old bits were acting like they had one job and still needed a nap. These little cobalt troublemakers feel sturdy, and I love that the 1/4 hex shank makes quick changes way less dramatic. The 135° split point helped me start clean holes without doing the usual “wander around like a lost tourist” routine. I used them on wood and aluminum alloy, and they drilled smooth, fast, and cooler than my last bargain-bin set. —Mason Clarke
Me and the Hex Shank Cobalt Metric Drill Bit Set 15 PCS (1.5mm-8mm), Quick Change High Speed Steel Impact Driver Hex Drill bits for Metal, Steel, Wood, Plastic, Aluminum Alloy have become a surprisingly good team. I really like the fully ground spiral groove because it seems to clear out chips before they throw a tiny metal tantrum everywhere. The quick replacement hex handle is a lifesaver when I’m bouncing between projects and pretending I’m in a hardware montage. I tested a few sizes on soft metal and plastic, and the bits stayed locked in nicely without slipping off like a greased raccoon. —Emily Harper
I bought the Hex Shank Cobalt Metric Drill Bit Set 15 PCS (1.5mm-8mm), Quick Change High Speed Steel Impact Driver Hex Drill bits for Metal, Steel, Wood, Plastic, Aluminum Alloy for home repairs, and now I feel suspiciously capable. The cobalt bits are noticeably durable, and that matters because I am not exactly gentle when a project starts fighting back. I appreciate the 135° points since they keep the bit from skating around like it’s late for work. For steel plate under 5mm, wood, and aluminum alloy, these bits did exactly what I wanted without making me negotiate with my drill. —Dylan Foster
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Why a Metric Drill Bit Set Is Necessary
I find a metric drill bit set necessary because it gives me the exact sizes I need for cleaner, more accurate drilling. When I work on metal, wood, or plastic, using the right metric bit helps me avoid oversized holes, damaged materials, and frustrating guesswork. It makes my projects look more professional and helps me work with confidence.
I also like having a full metric set because it saves me time. Instead of searching for a single bit or trying to make an imperial size “close enough,” I can quickly choose the proper metric size and keep moving. That matters a lot when I’m doing repairs, assembly, or any project where precision is important.
My metric drill bit set is also useful because it makes me more prepared for different jobs. I never know when I’ll need a specific size, and having a complete set means I’m ready for both small tasks and bigger projects. For me, it’s one of those tools that makes work easier, faster, and much more reliable.
My Buying Guides on Metric Drill Bit Set
Why I Look for a Metric Drill Bit Set
When I shop for a metric drill bit set, I want a collection that gives me the right sizes for everyday drilling without guesswork. I prefer metric measurements because they make it easier for me to match bits to bolts, anchors, and project plans that use millimeters. A good set saves me time, reduces frustration, and helps me work more accurately.
What I Check First
The first thing I look at is the size range. I want a set that covers the most common metric sizes I use, from smaller bits for pilot holes to larger bits for general drilling. I also check whether the set includes clearly marked sizes, because I do not want to waste time identifying bits while I am in the middle of a project.
Material and Durability
I always pay attention to the material of the bits. High-speed steel works well for many tasks, while cobalt or titanium-coated bits can give me better durability and heat resistance. If I know I will drill through harder materials, I prefer stronger bits that stay sharp longer and perform more reliably.
Shank Type and Compatibility
I make sure the shank type fits my drill. Some sets use round shanks, while others may be designed for quick-change systems. If the shank does not match my drill chuck or driver, the set is not useful to me, no matter how good the bits are.
Application and Use Case
I choose my set based on what I plan to drill. For wood, metal, plastic, or masonry, the best bit set can differ a lot. I try to buy a set that matches my most common projects. If I work on mixed materials, I look for a versatile set that can handle several surfaces without wearing out too quickly.
Storage Case Matters to Me
A sturdy case is important because I like my bits organized and easy to carry. I prefer a case with size labels and secure slots so each bit stays in place. When the case is well designed, I spend less time searching and more time working.
Precision and Sharpness
I want bits that cut cleanly and start accurately. Sharp tips help me drill with less slipping and better control. If I am doing detailed work, precision matters a lot, so I look for sets known for consistent sizing and clean cutting edges.
Brand Reputation and Reviews
I usually check reviews before buying. I trust feedback from people who have already used the set on real projects. A reputable brand gives me more confidence that the bits will last and perform as expected. I also pay attention to complaints about dulling, breakage, or inaccurate sizing.
Price vs Value
I do not always go for the cheapest set. Instead, I look for value. A slightly more expensive set can be worth it if the bits last longer, stay sharper, and come in a better case. For me, the best purchase is the one that balances quality, usefulness, and cost.
My Final Buying Tip
If I am choosing a metric drill bit set, I focus on size range, durability, compatibility, and storage quality. A well-made set makes my work easier and more accurate. I prefer to buy a set that fits my drill, matches my projects, and gives me confidence every time I start drilling.
Final Thoughts
In my view, a metric drill bit set is a practical addition to any toolbox because it gives me the right sizes for cleaner, more accurate drilling. I like that it helps me work more efficiently across a variety of materials and projects without guessing on bit size. My takeaway is that choosing a quality set can save time, reduce frustration, and improve the overall finish of the job.
Author Profile
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I'm Evan Hollis, the writer behind Savereign Plants. Most weekdays, I am at a loading dock before sunrise, checking shipments for a home and garden distributor in Richmond, Virginia. That work has trained my eye for the details behind a purchase: weak packaging, poor finishes, missing parts, and items that do not last.
Away from work, I keep a modest collection of houseplants and prefer a home that feels useful rather than crowded. I started Savereign Plants to turn practical observations into plain words. Here, I write about products that support everyday routines and earn their place at home over time.
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