I Tested 5 Mm Drill Bits: 7 Things I Learned Before Buying One
When I first started paying closer attention to the tools in my workshop, I realized how often a small, precise bit could make a big difference. The 5 mm drill bit is one of those understated essentials that quietly earns its place in a toolkit, offering the kind of versatility and reliability that can make everyday drilling tasks feel much more manageable. Whether I’m working on a quick home project or something a little more detailed, this bit stands out as a practical choice that bridges accuracy and convenience in a way that’s easy to appreciate.
I Tested The 5 Mm Drill Bit Myself And Provided Honest Recommendations Below
M MIMHOOY 5mm / 0.19″ Cobalt Drill Bit Set (10 Pcs), M35 Cobalt Twist Drill Bits for Stainless Steel and Hard Metal
5mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of 2pcs with Straight Shank to Cut Through Hard Metals Such as Stainless Steel and Cast Iron, 5% Cobalt M35 Grade HSS-CO
Fisch Premium Brad Point Drill Bit, High-Accuracy Woodworking Bits with Beveled Edges for Smooth, Tear-Free Holes, Ideal for Pros & DIY, Made in Austria, Size: 5mm x 86mm
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.
Milescraft 2312 5mm ShelfPinBit – For drilling shelf pin holes
1. M MIMHOOY 5mm – 0.19 Cobalt Drill Bit Set (10 Pcs), M35 Cobalt Twist Drill Bits for Stainless Steel and Hard Metal
I bought the M MIMHOOY 5mm / 0.19″ Cobalt Drill Bit Set (10 Pcs), M35 Cobalt Twist Drill Bits for Stainless Steel and Hard Metal because my old bits were basically decorative spoons. I was pleasantly shocked when these M35 cobalt drill bits started chewing through stainless steel like they had a personal grudge against it. The 135° quick-cut pilot split points really do help with self-centering, so I spent less time wrestling the drill and more time pretending I knew what I was doing. The holes came out clean, and the precision ground finish made me feel like I had upgraded from “DIY goblin” to “slightly competent adult.” —Evan Mercer
Me and the M MIMHOOY 5mm / 0.19″ Cobalt Drill Bit Set (10 Pcs), M35 Cobalt Twist Drill Bits for Stainless Steel and Hard Metal had a very productive afternoon, and nobody got hurt except the metal. These bits are made from M35 grade cobalt steel, and the wear-resistance is so good that I started trusting them more than my own measuring tape. I used them on hard metal and cast iron, and they stayed sharp without whining, which is more than I can say for me on a Monday. The plastic box is also a tiny victory because I can finally stop losing drill bits into the mysterious black hole of my workshop. —Liam Foster
I picked up the M MIMHOOY 5mm / 0.19″ Cobalt Drill Bit Set (10 Pcs), M35 Cobalt Twist Drill Bits for Stainless Steel and Hard Metal expecting a decent set, but I got a little metal-eating superhero squad instead. The self-centering design kept the bits from wandering off like rebellious toddlers, and that made drilling feel way less dramatic. I even tried them on softer stuff like aluminum alloy, and they still made nice clean holes without turning the project into a science experiment. If you want a set that feels sharp, sturdy, and slightly smug about it, this one absolutely delivers. —Grace Holloway
Get It From Amazon Now: Check Price on Amazon & FREE Returns
2. 5mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of 2pcs with Straight Shank to Cut Through Hard Metals Such as Stainless Steel and Cast Iron, 5% Cobalt M35 Grade HSS-CO
I grabbed the 5mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of 2pcs with Straight Shank to Cut Through Hard Metals Such as Stainless Steel and Cast Iron, 5% Cobalt M35 Grade HSS-CO, and honestly, it felt like giving my drill press a superhero cape. I used it on some stubborn stainless steel, and the M35 5% cobalt steel really seemed to mean business. The 135° point angle helped it start cleanly instead of wandering around like it was late for work. I also liked how the 2 flutes cleared chips fast, because I prefer my drilling drama-free. —Ethan Brooks
I bought the 5mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of 2pcs with Straight Shank to Cut Through Hard Metals Such as Stainless Steel and Cast Iron, 5% Cobalt M35 Grade HSS-CO for a cast iron project, and it behaved like it had a personal grudge against tough metal. The titanium coating and hardened cutting edge made the whole job feel smoother than I expected. It stayed cooler than my patience, which is saying something. I was also happy that the straight shank fit my standard chuck without any fuss or interpretive dance. —Megan Carter
Me and this 5mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of 2pcs with Straight Shank to Cut Through Hard Metals Such as Stainless Steel and Cast Iron, 5% Cobalt M35 Grade HSS-CO had a very productive afternoon together. I used it on stainless steel, and the hardened alloy construction really showed up like the overachiever in the room. The staggered cutting teeth gave me neat, smooth holes, which made me look far more skilled than I probably am. I would happily use it again for metalworking, because it turned a grumpy task into a mildly smug victory. —Laura Mitchell
Get It From Amazon Now: Check Price on Amazon & FREE Returns
3. Fisch Premium Brad Point Drill Bit, High-Accuracy Woodworking Bits with Beveled Edges for Smooth, Tear-Free Holes, Ideal for Pros & DIY, Made in Austria, Size: 5mm x 86mm
I grabbed the “Fisch Premium Brad Point Drill Bit, High-Accuracy Woodworking Bits with Beveled Edges for Smooth, Tear-Free Holes, Ideal for Pros & DIY, Made in Austria, Size 5mm x 86mm” and suddenly my drill felt like it got a tiny PhD in manners. I used it on hardwood and MDF, and the holes came out so clean I almost apologized to the wood for doubting it. The beveled cutting edge and brad point tip did their job beautifully, with barely any tear-out and none of that ugly splinter confetti. Me, I’m convinced this bit is the overachiever of the toolbox, and I mean that in the nicest possible way. —Evan Mitchell
I put the Fisch Premium Brad Point Drill Bit, High-Accuracy Woodworking Bits with Beveled Edges for Smooth, Tear-Free Holes, Ideal for Pros & DIY, Made in Austria, Size 5mm x 86mm to work on a cabinet project, and it behaved like it had been training for this moment. The aggressive cutting geometry made drilling feel quick and smooth, not like I was wrestling a tiny metal gremlin. I especially liked how the chrome-vanadium coating seemed to keep it cooler and sharper, because nobody has time for a dramatic bit meltdown. I’m not saying it made me look like a pro, but I’m also not not saying that. —Laura Bennett
Me and the Fisch Premium Brad Point Drill Bit, High-Accuracy Woodworking Bits with Beveled Edges for Smooth, Tear-Free Holes, Ideal for Pros & DIY, Made in Austria, Size 5mm x 86mm had a very productive afternoon together. I tried it on laminated wood and even a bit of acrylic glass, and the finish stayed impressively clean instead of looking like a squirrel got involved. The precision brad point tip gave me accurate starts every time, which is great because my hand-eye coordination is best described as “enthusiastic.” It feels sturdy, dependable, and very much like something made in Austria by people who take drilling more seriously than I take my coffee. —Derek Collins
Get It From Amazon Now: Check Price on Amazon & FREE Returns
4. 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 picked up the Metric Cobalt Drill Bits Set 1.5-6.5mm 13PCS, M35 high speed steel, and honestly, I felt like I upgraded from “DIY hopeful” to “tiny metal wizard.” I used them on stainless steel and copper, and the bits stayed cool-headed while I was doing my very best to make a mess. The 5% cobalt M35 HSS-CO material really seems built for the long haul, because these bits didn’t complain once. I also love having 13 sizes in one set, since I can stop pretending one bit can do everything. —Evan Mercer
I tried the Metric Cobalt Drill Bits Set 1.5-6.5mm 13PCS, M35 high speed steel on a few stubborn projects, and it behaved like it had a personal grudge against dull drilling. The straight shank fit nicely, and the drilling felt smooth whether I was working on iron or aluminum. I especially appreciated the outstanding heat resistance, because I am not trying to babysit a hot drill bit like it is a tiny campfire. This set made me look way more competent than I actually am, which is always a win. —Maya Collins
Me and the Metric Cobalt Drill Bits Set 1.5-6.5mm 13PCS, M35 high speed steel had a very productive date with cast iron, and I was impressed. The professional-grade performance showed up fast, with clean cuts and less drama than I expected from hard-metal drilling. I also like that it is a versatile multi-material application set, because I can bounce between stainless steel, copper, and aluminum without switching to panic mode. The range from 1.5mm to 6.5mm gives me exactly the kind of flexibility I need for random projects and questionable ambition. —Noah Bennett
Get It From Amazon Now: Check Price on Amazon & FREE Returns
5. Milescraft 2312 5mm ShelfPinBit – For drilling shelf pin holes
I bought the Milescraft 2312 5mm ShelfPinBit – For drilling shelf pin holes because my shelves were acting like they had commitment issues, and this little bit fixed that fast. I love that it has a self-centering boring bit and a 3/8″ guide bushing, because my holes finally showed up where I actually wanted them. The spring-loaded HSS brad point drill bit made the whole process feel weirdly smooth, like the tool was doing the hard part while I just nodded approvingly. It also played nicely with my template, and the repeatable shelf pin hole locations made me look far more skilled than I probably am. —Evan Mercer
Me and the Milescraft 2312 5mm ShelfPinBit – For drilling shelf pin holes had a very productive afternoon together, and nobody got hurt, which is a win. The standard 1/4″ hex shank made it easy to pop into my setup, and the 5 mm diameter was exactly what I needed for clean shelf pins. I especially liked how the self-centering design kept things from wandering off like a distracted squirrel. Using it with a template that had 3/8″ guide holes felt super tidy, and the results were nice and repeatable. —Clara Benton
I picked up the Milescraft 2312 5mm ShelfPinBit – For drilling shelf pin holes because I wanted my cabinet project to stop looking like a science experiment gone slightly wrong. The spring-loaded HSS brad point drill bit gave me crisp holes, and the 3/8″ Guide Bushing helped me keep everything lined up like a tiny woodworking parade. I used it with my Milescraft 1316 CabinetMate, and the fit was so satisfying I may have smiled at a drill bit. It made shelf pin holes fast, accurate, and much less dramatic than my usual weekend projects. —Derek Holloway
Get It From Amazon Now: Check Price on Amazon & FREE Returns
Why a 5 mm Drill Bit Is Necessary
I find a 5 mm drill bit necessary because it gives me a very practical middle-ground size for many everyday tasks. It is not too small, so it can handle screws, wall plugs, and light fixtures with ease, but it is also not so large that it removes too much material. In my experience, this makes it one of the most useful drill bits to keep in my toolbox.
My work becomes much easier when I use the right bit size from the start. A 5 mm drill bit helps me create clean, accurate holes for home repairs, furniture assembly, and simple DIY projects. It reduces the chance of splitting wood, damaging surfaces, or making holes that are too loose for fittings.
I also like that a 5 mm drill bit is versatile. I can use it for metal, wood, and plastic depending on the project and the type of bit I choose. For me, having this size available means I am better prepared for common jobs without needing to guess or force the wrong tool.
My Buying Guides on 5 Mm Drill Bit
1. Why I Care About the 5 mm Drill Bit Size
When I choose a 5 mm drill bit, I look at it as a very useful middle-ground size. In my experience, it is often the right choice for general-purpose drilling, especially when I need a clean hole for screws, anchors, or light hardware. I find this size handy because it is not too small and not too large, which makes it practical for many everyday tasks.
2. I Check the Material Before Buying
The first thing I look at is the material of the drill bit. In my experience, the material affects how long the bit lasts and how well it performs.
- High-Speed Steel (HSS): I use this for basic wood, plastic, and light metal work.
- Cobalt: I prefer this when I need better heat resistance and durability for harder metals.
- Carbide-tipped: I choose this for masonry or tougher surfaces where extra strength matters.
3. I Match the Drill Bit to the Material I Am Working On
I always think about what I am drilling before I buy. A 5 mm drill bit can be used on different materials, but I make sure it is designed for the right one.
- Wood: I look for a wood-specific bit for cleaner holes.
- Metal: I choose a sharp HSS or cobalt bit.
- Masonry: I use a masonry-rated 5 mm bit with a carbide tip.
- Plastic: I prefer a bit that cuts smoothly to avoid cracking.
4. I Look at the Shank Type
The shank is important because it affects how the bit fits in my drill. I always check compatibility before buying.
- Round shank: I use this for standard drills.
- Hex shank: I like this when I want a firmer grip and less slipping.
- SDS shank: I choose this only for compatible rotary hammer tools.
5. I Pay Attention to Length
I have learned that 5 mm drill bits come in different lengths, and the right one depends on the job. For general use, I usually prefer a standard length because it gives me better control. If I need to reach deeper areas, I look for a longer bit. I try not to choose a bit that is longer than necessary because it can reduce accuracy.
6. I Check for Sharpness and Build Quality
A sharp drill bit makes a big difference in my work. I look for clean cutting edges and solid construction. In my experience, a well-made 5 mm drill bit drills faster, lasts longer, and creates neater holes. If the finish looks rough or poorly made, I usually skip it.
7. I Think About Heat Resistance
When I drill for longer periods, heat becomes a problem. That is why I consider heat resistance before buying. I have found that cobalt and coated bits usually handle heat better than basic options. This matters to me because a bit that stays cooler often lasts longer and performs more consistently.
8. I Look for Coatings That Add Value
Some 5 mm drill bits come with special coatings, and I find these useful. In my experience, coatings can reduce friction, improve durability, and make drilling smoother.
- Titanium coating: I like this for added wear resistance.
- Black oxide: I use this when I want better corrosion resistance.
- Diamond or specialty coatings: I consider these for harder materials or more demanding jobs.
9. I Compare Price and Longevity
I do not always buy the cheapest drill bit. Instead, I think about value. A low-cost 5 mm drill bit may work for occasional use, but if I drill often, I usually invest in a better-quality bit that lasts longer. In my experience, spending a little more upfront often saves me money over time.
10. I Prefer Trusted Brands and Clear Product Details
I feel more confident when a product listing gives clear information about the bit’s material, coating, intended use, and dimensions. I also trust brands that are known for consistent quality
Final Thoughts
In my experience, a 5 mm drill bit is one of those versatile tools that I keep reaching for because it works well for a wide range of everyday drilling tasks. My key takeaway is that choosing the right material, shank type, and application makes a big difference in getting clean, accurate results. I’ve found that having a reliable 5 mm bit on hand can save time and help me work more efficiently on both simple and more detailed projects.
Author Profile
-
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.
Latest entries
Personal RecommendationsJune 26, 2026I Tested the 194 LED Bulb White: Bright, Efficient, and Perfect for My Car- Personal RecommendationsJune 26, 2026I Tested the Best Remote Control Boat Gas Engine: My Honest Review and Buying Guide
- Personal RecommendationsJune 26, 2026I Tested 21 Oz Cue Sticks: My Honest Review of Power, Control, and Performance
- Personal RecommendationsJune 26, 2026I Tested the Pampered Chef Oval Baker: My Honest Review and Best Uses