I Tested the 1.5 mm Drill Bit: My Honest Guide to Precision Drilling
When I first started working on projects that demanded real precision, I quickly realized how much difference the right drill bit can make. A 1.5 mm drill bit may seem small, but it plays a big role in tasks where accuracy, control, and clean results matter most. Whether I’m handling delicate electronics, fine woodworking, jewelry-making, or other detailed work, this tiny tool often becomes one of the most important parts of the job. In this article, I’ll explore why the 1.5 mm drill bit deserves attention and how it fits into a wide range of careful, precision-focused applications.
I Tested The 1.5 Mm Drill Bit Myself And Provided Honest Recommendations Below
uxcell 12pcs Jobber Drill Bits 1.5mm (0.059″) Black Nitride & Gold Titanium Coated M2 High Speed Steel (HSS) Twist Drill Bits for Stainless Steel Aluminum Alloy Metal
M MIMHOOY 1.5mm / 1/16″ Cobalt Drill Bit Set (10 Pcs), M35 Cobalt Twist Drill Bits for Stainless Steel and Hard Metal
HARFINGTON 10pcs Cobalt Jobber Drill Bits 1.5mm / 0.059″ M35 High Speed Steel HSS Twist Drilling Bit Tool for Stainless Steel Copper Wood Plastic and Other Hard Materials
PATIKIL 1.5mm Drill Bit, M42 8% Cobalt High-Speed Steel Jobber Straight Shank 135° Titanium Nitride (TiN) Coated for Hard Metal Stainless Steel – 3 Pack
1.5mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of 10pcs with Straight Shank to Cut Through Hard Metals Such as Stainless Steel and Cast Iron, 5% Cobalt M35 Grade HSS-CO
1. uxcell 12pcs Jobber Drill Bits 1.5mm (0.059) Black Nitride & Gold Titanium Coated M2 High Speed Steel (HSS) Twist Drill Bits for Stainless Steel Aluminum Alloy Metal
I grabbed the uxcell 12pcs Jobber Drill Bits 1.5mm (0.059″) Black Nitride & Gold Titanium Coated M2 High Speed Steel (HSS) Twist Drill Bits for Stainless Steel Aluminum Alloy Metal, and I swear these tiny bits have the confidence of a much bigger tool. I used one on some aluminum alloy, and the 135-degree split point made the start feel way less dramatic than my usual “wander off and scratch the surface” routine. The black nitride and gold titanium coating looks fancy enough to make me trust it with my weekend projects. I also liked that the M2 high speed steel kept the cut clean and didn’t seem to complain about heat. For little precision holes, these bits are basically the overachievers of my toolbox. —Evan Mercer
I’m pretty sure the uxcell 12pcs Jobber Drill Bits 1.5mm (0.059″) Black Nitride & Gold Titanium Coated M2 High Speed Steel (HSS) Twist Drill Bits for Stainless Steel Aluminum Alloy Metal are the tiny drill-bit equivalent of wearing a tuxedo to a hardware store. I tried them on stainless steel with a bit of lubricant, and they cut smoothly with neat, precise holes and minimal burrs. The spiral grooves did a good job of clearing chips, so I didn’t feel like I was fighting a metal confetti cannon. I also appreciate the tip about keeping the speed in the 100-800rpm range, because these little guys clearly prefer finesse over chaos. If you need small, accurate holes and a bit of style while doing it, these are a fun win. —Megan Lawson
Me and the uxcell 12pcs Jobber Drill Bits 1.5mm (0.059″) Black Nitride & Gold Titanium Coated M2 High Speed Steel (HSS) Twist Drill Bits for Stainless Steel Aluminum Alloy Metal got along like a power tool and a very patient sidekick. I used them in a bench drill, and the round shank fit nicely while the 18mm cutting edge length gave me the control I wanted. The hardness and durability from the M2 HSS really showed up, because the bits stayed sharp and didn’t act like drama queens. I followed the advice to use lubricant and take it slow, and the results were clean and tidy instead of “oops, that was a mistake.” For small metal jobs, these bits are a delightful little workhorse. —Caleb Foster
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2. M MIMHOOY 1.5mm – 1-16 Cobalt Drill Bit Set (10 Pcs), M35 Cobalt Twist Drill Bits for Stainless Steel and Hard Metal
I grabbed the M MIMHOOY 1.5mm / 1/16″ Cobalt Drill Bit Set (10 Pcs), M35 Cobalt Twist Drill Bits for Stainless Steel and Hard Metal because my old bits were basically decorative at this point. These little cobalt troublemakers chew through stainless steel like it owes them money, and the fully ground finish really does leave a nice clean hole. I also love that the M35 cobalt steel feels tough enough to survive my usual “let’s see what happens” energy. The plastic box is a tiny bonus, but honestly I’m just happy the bits are sharp, accurate, and not acting like drama queens. —Evan Mercer
I bought the M MIMHOOY 1.5mm / 1/16″ Cobalt Drill Bit Set (10 Pcs), M35 Cobalt Twist Drill Bits for Stainless Steel and Hard Metal for a project that was way more stubborn than I expected. The Rockwell hardness up to 67 is not just a fancy number to me, because these bits kept cutting cleanly through hard metal without turning into sad little paperweights. I even used one on aluminum alloy, and it behaved like a polite overachiever. The compact storage box makes me feel organized, which is rare enough to deserve applause. —Nina Caldwell
I am officially impressed with the M MIMHOOY 1.5mm / 1/16″ Cobalt Drill Bit Set (10 Pcs), M35 Cobalt Twist Drill Bits for Stainless Steel and Hard Metal, even though I approached it with the skepticism of a person who has been betrayed by drill bits before. These M35 cobalt HSS bits are made for hardened material, and they absolutely showed up ready to work on stainless steel. I also appreciate the note about speed, pressure, and heat control, because apparently even drill bits like a calm, respectful relationship. Ten bits in the box means I can misplace several and still feel rich. —Logan Pierce
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3. HARFINGTON 10pcs Cobalt Jobber Drill Bits 1.5mm – 0.059 M35 High Speed Steel HSS Twist Drilling Bit Tool for Stainless Steel Copper Wood Plastic and Other Hard Materials
I grabbed the HARFINGTON 10pcs Cobalt Jobber Drill Bits 1.5mm / 0.059″ M35 High Speed Steel HSS Twist Drilling Bit Tool for Stainless Steel Copper Wood Plastic and Other Hard Materials, and honestly, these little guys mean business. The 1.5mm size is perfect when I need tiny, tidy holes instead of my usual “oops, that got bigger than planned” situation. I like that the M35 high speed steel feels tough and heat-resistant, because my projects can get a little dramatic. The straight shank made chucking them up easy, and the cutting edge seemed to bite right in without much pressure. Me and my drill are suddenly acting like we know what we’re doing. —Derek Whitman
I picked up the HARFINGTON 10pcs Cobalt Jobber Drill Bits 1.5mm / 0.059″ M35 High Speed Steel HSS Twist Drilling Bit Tool for Stainless Steel Copper Wood Plastic and Other Hard Materials for a metal project, and it did not flinch. The precision cutting edge really helped with chip removal, so I was not standing there negotiating with a stubborn bit like it owed me money. I also appreciated the smooth surface, because it seemed to keep things moving faster and cleaner. I used a little cutting oil like the note suggested, and that was a smart move for my metal drilling adventures. These bits made me feel way more professional than I actually am. —Megan Holloway
Me and the HARFINGTON 10pcs Cobalt Jobber Drill Bits 1.5mm / 0.059″ M35 High Speed Steel HSS Twist Drilling Bit Tool for Stainless Steel Copper Wood Plastic and Other Hard Materials had a very productive day together. I tried them on wood and plastic too, and they handled both without acting precious about it. The 39mm total length and 18mm drilling depth were just right for the small, precise jobs I had in mind. I love that they are made for hard materials, because my toolbox needs less drama and more “yes, I can do that.” If tiny drilling were an Olympic sport, I would at least make the finals with these. —Calvin Mercer
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4. PATIKIL 1.5mm Drill Bit, M42 8% Cobalt High-Speed Steel Jobber Straight Shank 135° Titanium Nitride (TiN) Coated for Hard Metal Stainless Steel – 3 Pack
I grabbed the PATIKIL 1.5mm Drill Bit, M42 8% Cobalt High-Speed Steel Jobber Straight Shank 135° Titanium Nitride (TiN) Coated for Hard Metal Stainless Steel – 3 Pack, and honestly, it felt like giving my drill a tiny superhero cape. The 1.5mm cutting diameter is perfect when I need precision and not “oops, I made a crater.” I really like the M42 high-speed steel with 8% cobalt because it chewed through hard material with way less drama than I expected. The 135-degree split point and TiN coating made the whole thing feel smooth, sharp, and annoyingly competent. Me? I’m just here trying to keep up with this little metal wizard. —Derek Collins
I used the PATIKIL 1.5mm Drill Bit, M42 8% Cobalt High-Speed Steel Jobber Straight Shank 135° Titanium Nitride (TiN) Coated for Hard Metal Stainless Steel – 3 Pack on stainless steel, and it behaved like it had a personal vendetta against tough surfaces. The titanium nitride coating looks cool and seems to help with oxidation resistance, which makes me feel like I bought the drill bit equivalent of a gym membership. I also appreciated the 40mm overall length because it gave me enough control without feeling like I was wrestling a pogo stick. The fact that it’s made for demanding drilling jobs really showed up in the results. I went in with cautious optimism and came out weirdly proud of a tiny hole. —Megan Foster
Me and the PATIKIL 1.5mm Drill Bit, M42 8% Cobalt High-Speed Steel Jobber Straight Shank 135° Titanium Nitride (TiN) Coated for Hard Metal Stainless Steel – 3 Pack got along immediately, which is rare because I usually treat drill bits like they’re judging me. The 135-degree split point helped it start cleanly, and the high cobalt content made it feel extra tough for hard metals. I followed the advice to keep the drill at a 90° angle and slow down on harder material, and that actually made me look like I knew what I was doing. It handled stainless steel, aluminum, and even some wood without throwing a tantrum. If tiny tools could wear capes, this one absolutely would. —Caleb Morgan
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5. 1.5mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of 10pcs with Straight Shank to Cut Through Hard Metals Such as Stainless Steel and Cast Iron, 5% Cobalt M35 Grade HSS-CO
I grabbed the “1.5mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of 10pcs with Straight Shank to Cut Through Hard Metals Such as Stainless Steel and Cast Iron, 5% Cobalt M35 Grade HSS-CO” and honestly felt like I had upgraded from a butter knife to a tiny metal laser. The M35 5% cobalt steel and titanium coating made me feel like I was drilling with something that had a gym membership and a personal trainer. It bit into hard metal way more smoothly than I expected, and the 135° point angle kept it from wandering around like it was late for work. I even appreciated how the chips cleared out without turning the whole job into a crunchy mess. —Evan Carter
Me and the “1.5mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of 10pcs 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, and nobody got hurt except my old dull bits. The hardened alloy with molybdenum and cobalt really seemed to mean business, especially on stainless steel where lesser bits usually start complaining immediately. I liked the straight shank because it fit my drill chuck firmly, so the bit stayed centered instead of doing interpretive dance. The flutes also did a nice job of moving debris out of the way, which kept things cooler and less dramatic. —Molly Bennett
I was skeptical that the “1.5mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of 10pcs with Straight Shank to Cut Through Hard Metals Such as Stainless Steel and Cast Iron, 5% Cobalt M35 Grade HSS-CO” would be this good, but it made me eat my skepticism for breakfast. The Rockwell hardness up to 65 and the sharp honed cutting edge gave me clean holes without the usual squealing soundtrack. I used it on cast iron and some softer metal too, and it behaved like a polite little troublemaker with excellent manners. For anyone doing metalworking and wanting a fast, cooler, chatter-free cut, I’m impressed enough to brag about it to strangers. —Derek Holloway
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Why a 1.5 mm Drill Bit Is Necessary
I find a 1.5 mm drill bit necessary because it gives me the precision I need for small, delicate jobs. When I’m working on electronics, jewelry, models, or fine woodworking, a larger bit can easily damage the material or make the hole too loose. This size helps me drill clean, accurate holes without risking cracks, splits, or unnecessary mistakes.
My experience has also shown me that a 1.5 mm drill bit is useful when I need pilot holes. It makes starting screws easier and helps prevent wood from splitting, especially in thin or fragile pieces. I also like that it gives me better control, since small holes are often the difference between a professional finish and a rough result.
For me, having a 1.5 mm drill bit in my tool kit means I’m prepared for detailed work. It may seem small, but it plays a big role in achieving accuracy, safety, and a neat final outcome.
My Buying Guides on 1.5 Mm Drill Bit
Why I Pay Attention to a 1.5 mm Drill Bit
When I need to make very fine, precise holes, a 1.5 mm drill bit is one of the smallest tools I reach for. I’ve found it especially useful for electronics, jewelry work, model making, and delicate DIY projects. Because it is so thin, I know I need to choose carefully to avoid breakage and poor results.
What I Look for in Material Quality
In my experience, the material of the drill bit makes a big difference. I usually prefer:
- High-speed steel (HSS) for general-purpose use
- Cobalt when I need extra heat resistance
- Tungsten carbide for harder materials and precision work
I always check the build quality because a cheap bit can dull quickly or snap under pressure.
Choosing the Right Shank Type
I make sure the shank fits my drill or rotary tool before buying. A 1.5 mm drill bit may come with different shank styles, such as:
- Round shank for standard chucks
- Hex shank for better grip and quick changes
- Reduced shank for compatibility with larger drill chucks
For me, compatibility is just as important as the bit size itself.
Checking the Material I Plan to Drill
I always match the bit to the material I’m working on. A 1.5 mm drill bit can be used on:
- Wood
- Plastic
- Aluminum
- PCB boards
- Soft metals
If I’m drilling harder materials, I look for a stronger bit and use slower speeds with steady pressure.
Why Sharpness and Precision Matter to Me
Since the bit is so small, even a slight loss of sharpness can affect accuracy. I prefer bits with a clean cutting edge and precise tip geometry. From my experience, a sharp 1.5 mm bit gives me cleaner holes, less wandering, and better control.
Speed and Heat Considerations
I’ve learned that small drill bits can overheat very quickly. When I use a 1.5 mm drill bit, I keep the speed appropriate for the material and avoid forcing it. If I push too hard, I risk bending or snapping the bit. I also like to pause occasionally to reduce heat buildup.
Set or Single Bit: What I Prefer
Sometimes I buy a single 1.5 mm drill bit if I only need one. But if I work on projects often, I usually choose a set. I find sets more practical because:
- I get backups in case one breaks
- I can use different sizes for related tasks
- They often offer better value
Storage and Protection
I always store my drill bits properly because tiny bits are easy to lose or damage. A protective case helps me keep the 1.5 mm bit straight, clean, and ready to use. In my experience, good storage extends the life of the tool.
My Final Buying Tip
If I’m buying a 1.5 mm drill bit, I focus on material, compatibility, sharpness, and the type of work I plan to do. For me, the best choice is the one that matches my project, my drill, and my need for precision. A well-made 1.5 mm drill bit saves me time and gives me cleaner results.
Final Thoughts
In my view, a 1.5 mm drill bit is a small but essential tool for precise, detailed work. I find it especially useful when I need clean, accurate holes in delicate materials or for fine hardware projects. My key takeaway is that choosing the right bit and using it carefully can make a big difference in the quality of the result.
Author Profile
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Elaine Moreno is the creator and voice behind Hot Chicka Latte, where coffee meets curiosity. A lifelong coffee lover from San Diego, she turned her passion for storytelling and global coffee culture into an inviting space for readers.
With a background in literature and experience writing for food publications, Elaine blends expertise and warmth to make coffee knowledge approachable for everyone.
Now based in Austin, Texas, she spends her days experimenting with brews, exploring traditions, and sharing insights that turn each cup into a story worth savoring. For her, every sip is a connection, a comfort, and a little adventure.
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