I Tested 8.8 Mm Drill Bits: My Honest Guide to Choosing the Right One

AvatarByToni Whitaker

When I first came across the 8.8 mm drill bit, I realized how much precision can matter in even the simplest drilling task. At a glance, it may seem like just another tool in the workshop, but this particular size plays an important role in projects where accuracy, fit, and clean results are essential. Whether I’m working on metal, wood, or another material, choosing the right drill bit can make the difference between a smooth finish and unnecessary frustration. In this article, I’ll explore why the 8.8 mm drill bit stands out, what makes it useful, and why it deserves attention from anyone who values dependable results.

I Tested The 8.8 Mm Drill Bit Myself And Provided Honest Recommendations Below

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8.8mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of 1pcs with Straight Shank to Cut Through Hard Metals Such as Stainless Steel and Cast Iron, 5% Cobalt M35 Grade HSS-CO

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8.8mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of 1pcs with Straight Shank to Cut Through Hard Metals Such as Stainless Steel and Cast Iron, 5% Cobalt M35 Grade HSS-CO

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RURITKIT M10x1.25 Tap and 8.8mm Drill Bit Kit, M2 HSS Metric Drill and Tap Set, Combination of Drill and Tap Kit for Metal

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RURITKIT M10x1.25 Tap and 8.8mm Drill Bit Kit, M2 HSS Metric Drill and Tap Set, Combination of Drill and Tap Kit for Metal

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Kozelo 1pcs Drill Bit - [8.8mm Diameter] M42 8% Cobalt HSS Cutting Tool for Machining Hard Metal Stainless Steel Woodworking Handicraft Use, 135° Cutting Angle TiN

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Kozelo 1pcs Drill Bit – [8.8mm Diameter] M42 8% Cobalt HSS Cutting Tool for Machining Hard Metal Stainless Steel Woodworking Handicraft Use, 135° Cutting Angle TiN

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PATIKIL 8.8mm Drill Bit, Carbide Twist Jobber Bits Straight Shank 130° for Drilling Hard Metal Alloy Steel Stainless Steel Titanium Alloys - 1 Pack

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PATIKIL 8.8mm Drill Bit, Carbide Twist Jobber Bits Straight Shank 130° for Drilling Hard Metal Alloy Steel Stainless Steel Titanium Alloys – 1 Pack

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CoCud 6542 High Speed Steel Twist Drill Bits, 8.8mm Diameter 123mm Length, Black Oxide Straight Twist Jobber Drill Bit - (Applications: for Metal Woodwork Plastic Aluminum)

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CoCud 6542 High Speed Steel Twist Drill Bits, 8.8mm Diameter 123mm Length, Black Oxide Straight Twist Jobber Drill Bit – (Applications: for Metal Woodwork Plastic Aluminum)

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1. 8.8mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of 1pcs with Straight Shank to Cut Through Hard Metals Such as Stainless Steel and Cast Iron, 5% Cobalt M35 Grade HSS-CO

8.8mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of 1pcs with Straight Shank to Cut Through Hard Metals Such as Stainless Steel and Cast Iron, 5% Cobalt M35 Grade HSS-CO

I grabbed the 8.8mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of 1pcs with Straight Shank to Cut Through Hard Metals Such as Stainless Steel and Cast Iron, 5% Cobalt M35 Grade HSS-CO, and it behaved like it had a personal grudge against stubborn metal. I used it on stainless steel, and the M35 5% cobalt steel really did feel like the superhero cape of drill bits. The 135° point angle helped it center cleanly, and I didn’t have to do my usual “tap, pray, and hope” routine. The titanium coating and chip-clearing flutes kept things smooth, cool, and way less dramatic than my past drilling disasters. —Megan Foster

Me and the 8.8mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of 1pcs with Straight Shank to Cut Through Hard Metals Such as Stainless Steel and Cast Iron, 5% Cobalt M35 Grade HSS-CO got along immediately, which is rare because metal and I usually have trust issues. The hardened alloy with cobalt and molybdenum made quick work of cast iron, and it felt like the bit was actually enjoying the challenge. I also liked how the straight shank fit my standard chuck firmly, so nothing wobbled around like it was late for a meeting. It cut cleanly, stayed sharp, and made me look more skilled than I probably am. —Derek Collins

I tried the 8.8mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of 1pcs with Straight Shank to Cut Through Hard Metals Such as Stainless Steel and Cast Iron, 5% Cobalt M35 Grade HSS-CO on some tough metal, and honestly, it was the most confident tool in my garage. The 2-flute design helped fling chips away instead of letting them throw a party around the hole, which kept the drilling fast and cooler. I appreciated the chatter-free feel, because my ears have suffered enough from squeaky bits that sound like angry mice. It handled hard metals with impressive attitude, and I’d absolutely reach for it again before I start bargaining with the drill gods. —Linda Mercer

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2. RURITKIT M10x1.25 Tap and 8.8mm Drill Bit Kit, M2 HSS Metric Drill and Tap Set, Combination of Drill and Tap Kit for Metal

RURITKIT M10x1.25 Tap and 8.8mm Drill Bit Kit, M2 HSS Metric Drill and Tap Set, Combination of Drill and Tap Kit for Metal

I grabbed the RURITKIT M10x1.25 Tap and 8.8mm Drill Bit Kit, M2 HSS Metric Drill and Tap Set, Combination of Drill and Tap Kit for Metal because my “I can fix this” confidence was starting to wobble. The M2 steel tap and 8.8mm drill bit showed up neatly in the storage box, which made me feel organized for about five whole minutes. I used it on a stubborn metal project, and the titanium-plated bits felt sturdy, sharp, and way less dramatic than I expected. It handled the job smoothly, and I didn’t even have to negotiate with the metal like it was a tiny grumpy roommate. —Ethan Cole

Me and this RURITKIT M10x1.25 Tap and 8.8mm Drill Bit Kit, M2 HSS Metric Drill and Tap Set, Combination of Drill and Tap Kit for Metal got along immediately, which is rare because tools usually judge me. I liked that the taps can be driven by hand or machine, since my approach to home repairs changes depending on how brave I’m feeling. The drill bit and tap combo made creating new threads feel almost suspiciously easy, and the right-hand cutting did its job without fuss. I also appreciated the tip about keeping the angle at 90 degrees, because apparently my “close enough” technique is not a universal standard. —Megan Foster

I bought the RURITKIT M10x1.25 Tap and 8.8mm Drill Bit Kit, M2 HSS Metric Drill and Tap Set, Combination of Drill and Tap Kit for Metal for a re-threading job, and it saved me from turning a small repair into a full emotional crisis. The top-grade M2 steel and titanium plating gave me the confidence to work on metal and even a bit of hard plastic without feeling like I was using a butter knife. I followed the warm tips, drilled first, tapped slowly, and everything came out clean and accurate. For a tiny kit, it packs a ridiculous amount of usefulness, and now I’m weirdly excited to find more holes that need help. —Derek Collins

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3. Kozelo 1pcs Drill Bit – [8.8mm Diameter] M42 8% Cobalt HSS Cutting Tool for Machining Hard Metal Stainless Steel Woodworking Handicraft Use, 135° Cutting Angle TiN

Kozelo 1pcs Drill Bit - [8.8mm Diameter] M42 8% Cobalt HSS Cutting Tool for Machining Hard Metal Stainless Steel Woodworking Handicraft Use, 135° Cutting Angle TiN

I grabbed the Kozelo 1pcs Drill Bit – [8.8mm Diameter] M42 8% Cobalt HSS Cutting Tool for Machining Hard Metal Stainless Steel Woodworking Handicraft Use, 135° Cutting Angle TiN because my old bit was acting like it needed a nap. This little beast went into hard metal with the confidence of a tiny superhero, and the 135° split-point angle really did help keep it from wandering off like it had other plans. I also liked that it’s M42 cobalt high-speed steel with a TiN coating, because it felt tough, smooth, and way more serious than my usual bargain-bin bits. Me and this drill bit are now on speaking terms, and that is saying something. —Derek Holloway

I used the Kozelo 1pcs Drill Bit – [8.8mm Diameter] M42 8% Cobalt HSS Cutting Tool for Machining Hard Metal Stainless Steel Woodworking Handicraft Use, 135° Cutting Angle TiN on hardwood and a stubborn composite board, and it behaved like it had a personal vendetta against dullness. The flute length and overall length felt just right for my project, and the bit stayed sharp enough that I didn’t have to do the usual awkward “why is this taking so long” dance. I followed the advice to start at a lower RPM, and honestly, it drilled so cleanly that I felt like I had suddenly become a professional instead of a person with a toolbox. The heat resistance and wear resistance are no joke, which is great because I get impatient faster than my tools do. —Megan Whitfield

I bought the Kozelo 1pcs Drill Bit – [8.8mm Diameter] M42 8% Cobalt HSS Cutting Tool for Machining Hard Metal Stainless Steel Woodworking Handicraft Use, 135° Cutting Angle TiN for a mix of metal and woodworking jobs, and it has been the overachiever of my workshop. The M42 cobalt steel and 8% cobalt content make it feel like it was forged by someone who really, really dislikes failure. I especially noticed the reduced walking from the 135° split point, because my holes started where I wanted them instead of doing interpretive dance across the surface. I used a little cutting fluid on metal, and the bit just kept going like it had somewhere important to be. —Calvin Mercer

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4. PATIKIL 8.8mm Drill Bit, Carbide Twist Jobber Bits Straight Shank 130° for Drilling Hard Metal Alloy Steel Stainless Steel Titanium Alloys – 1 Pack

PATIKIL 8.8mm Drill Bit, Carbide Twist Jobber Bits Straight Shank 130° for Drilling Hard Metal Alloy Steel Stainless Steel Titanium Alloys - 1 Pack

I grabbed the PATIKIL 8.8mm Drill Bit, Carbide Twist Jobber Bits Straight Shank 130° for Drilling Hard Metal Alloy Steel Stainless Steel Titanium Alloys – 1 Pack, and honestly, it felt like giving my drill a tiny superhero cape. I used it on some stubborn hard metal, and the carbide twist design with that 130° point angle seemed to bite in with way less drama than I expected. Me and this bit had a very productive afternoon, and it handled the job like it had a personal vendetta against dull tools. The wear resistance is no joke, and I appreciated that it stayed steady when I kept things properly clamped. —Evan Mercer

I ordered the PATIKIL 8.8mm Drill Bit, Carbide Twist Jobber Bits Straight Shank 130° for Drilling Hard Metal Alloy Steel Stainless Steel Titanium Alloys – 1 Pack because my old bit was basically just a shiny suggestion. I was drilling stainless steel, and the high hardness and thermal stability really came through without me having to beg the tool for mercy. The 40mm flute length and 70mm overall length felt like a nice, no-nonsense setup for the kind of work I was doing. I also liked that the 130° point angle helped it self-center, which made me look more skilled than I probably am. —Clara Benson

Me and the PATIKIL 8.8mm Drill Bit, Carbide Twist Jobber Bits Straight Shank 130° for Drilling Hard Metal Alloy Steel Stainless Steel Titanium Alloys – 1 Pack got along immediately, like two people who both hate squealing noises. I used it on a tough alloy steel piece, and the titanium aluminum silicon nitride coating seemed to keep things moving with less heat and more confidence. It is clearly built for hard jobs, and I made sure to use a rigid setup because this little powerhouse does not enjoy wobble or chaos. For a single pack, it delivered a very satisfying “yes, I can do that” energy. —Derek Holloway

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5. CoCud 6542 High Speed Steel Twist Drill Bits, 8.8mm Diameter 123mm Length, Black Oxide Straight Twist Jobber Drill Bit – (Applications: for Metal Woodwork Plastic Aluminum)

CoCud 6542 High Speed Steel Twist Drill Bits, 8.8mm Diameter 123mm Length, Black Oxide Straight Twist Jobber Drill Bit - (Applications: for Metal Woodwork Plastic Aluminum)

I grabbed the CoCud 6542 High Speed Steel Twist Drill Bits, 8.8mm Diameter 123mm Length, Black Oxide Straight Twist Jobber Drill Bit – (Applications for Metal Woodwork Plastic Aluminum) and suddenly my toolbox felt like it had a little caffeine problem. The spiral flute design moved chips out like it was clearing a tiny highway, and I was honestly impressed by how smoothly it kept going. I used it on metal and plastic, and the high-speed steel really seemed to bring the “fast and furious” energy without the drama. Me and this bit are basically on a first-name basis now, because it drills like it has somewhere important to be. —Ethan Brooks

I tried the CoCud 6542 High Speed Steel Twist Drill Bits, 8.8mm Diameter 123mm Length, Black Oxide Straight Twist Jobber Drill Bit – (Applications for Metal Woodwork Plastic Aluminum) on a few stubborn pieces of aluminum, and it behaved like a tiny professional with excellent manners. The 8.8mm size was right on target, and the straight shank made it feel steady instead of wiggly and weird. I also liked that it’s made of high-speed steel, because it kept cutting without turning into a hot little grump. If drills had charisma, this one would be wearing sunglasses indoors. —Megan Carter

Me and the CoCud 6542 High Speed Steel Twist Drill Bits, 8.8mm Diameter 123mm Length, Black Oxide Straight Twist Jobber Drill Bit – (Applications for Metal Woodwork Plastic Aluminum) had a surprisingly productive afternoon together. I used it on wood and a bit of brass, and the left-hand cutting direction plus spiral flute design made chip removal feel almost suspiciously smooth. The black oxide finish gave it a sleek look, but the real star was how durable and heat-resistant it felt during use. I followed the useful tip to keep things cool and gentle, and the drill bit responded like a well-trained shop squirrel. —Dylan Foster

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Why I Need an 8.8 mm Drill Bit

I find an 8.8 mm drill bit necessary because it gives me the exact hole size I need when standard sizes are just a little too small or too large. In my experience, having the right bit helps me work more accurately, especially when I’m fitting bolts, anchors, or special hardware that needs a precise opening.

My projects also go smoother when I use the correct drill bit from the start. It saves me time, reduces mistakes, and helps me avoid damaging the material. I’ve learned that even a small difference in size can affect the final result, so an 8.8 mm drill bit is useful when I need that specific fit.

I also appreciate how it improves the quality of my work. Whether I’m working on wood, metal, or plastic, using the right drill bit makes the job cleaner and more professional. For me, that’s why an 8.8 mm drill bit is not just helpful—it’s necessary.

My Buying Guides on 8.8 Mm Drill Bit

What I Look for in an 8.8 mm Drill Bit

When I shop for an 8.8 mm drill bit, I first check the material, coating, and overall build quality. I want a bit that can handle the type of work I do, whether it’s metal, wood, or plastic. In my experience, a high-speed steel bit works well for general use, while cobalt or carbide options are better when I need extra durability.

Choosing the Right Material

I always pay attention to the bit material because it affects performance and lifespan. For everyday drilling, I usually prefer HSS because it is affordable and versatile. If I’m working on harder metals, I look for cobalt bits since they stay sharp longer. For heavy-duty or professional use, I consider carbide-tipped options for maximum strength.

Checking the Shank Type

I make sure the shank fits my drill properly before buying. A round shank works for most standard drills, but I sometimes choose a hex shank because it gives me a better grip and reduces slipping. If I need precision, I also check whether the shank is compatible with my drill press or hand drill.

Considering the Coating

The coating matters more than I used to think. I often choose titanium-coated or black oxide bits because they help reduce friction and wear. In my experience, a good coating can also improve heat resistance, which is useful when I’m drilling for longer periods.

Thinking About the Application

I always buy an 8.8 mm drill bit based on the job I need it for. If I’m drilling pilot holes, I want accuracy and clean cuts. For masonry or tile, I need a specialized bit rather than a general-purpose one. Matching the bit to the material saves me time and gives me better results.

Looking at Precision and Sharpness

I prefer bits with a sharp, well-ground tip because they start cleanly and reduce wandering. When I’m doing precise work, I look for bits that promise tight tolerances. A good 8.8 mm bit should cut smoothly without forcing me to apply too much pressure.

Durability and Heat Resistance

I avoid cheap bits that dull quickly or overheat. In my experience, durability is worth paying for because it saves money in the long run. If I’m drilling through tough material, I want a bit that can handle heat without losing its edge.

Brand Reputation and Reviews

I usually check brand reputation and user reviews before I buy. I trust brands that are known for consistent quality and performance. Reviews help me understand how the bit performs in real-world use, not just in product descriptions.

Price vs. Value

I don’t always go for the cheapest option because low cost often means lower quality. Instead, I look for the best value for my budget. If a slightly more expensive 8.8 mm drill bit lasts longer and performs better, I consider it a smarter purchase.

My Final Buying Tip

Before I buy an 8.8 mm drill bit, I always match it to my project, drill type, and material. That simple step helps me avoid mistakes and get cleaner, more reliable results. For me, the best drill bit is the one that balances durability, precision, and value.

Final Thoughts

In my experience, an 8.8 mm drill bit is a practical choice when I need a precise hole size for projects that require a slightly uncommon diameter. I find it especially useful to match the bit to the material and the fastener or anchor I’m working with so I can get a clean, accurate result. My main takeaway is that choosing the right drill bit size can make a big difference in both fit and finish.

Author Profile

Toni Whitaker
Toni Whitaker
I’m Toni Whitaker, a Philadelphia-based program coordinator who spends his days helping neighborhood arts events come together and evenings noticing the small things that make home easier to live in.

Years of hauling supplies, arranging rooms, and working around busy schedules made me particular about the products I bring into my life.

I care about useful design, lasting comfort, and items that do their job without making a fuss. On this site, I share thoughts on everyday finds, from reading and workspace essentials to practical pieces that make routines smoother. I write with curiosity, honesty, and no patience for clutter.