I Tested the 6.8 mm Drill Bit: My Honest Review and Best Use Cases
When I first encountered the 6.8 mm drill bit, I was intrigued by its precise size and the unique applications it promised. It’s not just another tool in the box; this drill bit holds a special place in various projects where accuracy and reliability matter most. Whether you’re a seasoned professional or a DIY enthusiast, understanding the capabilities and advantages of a 6.8 mm drill bit can truly elevate the quality of your work. Let me take you through why this specific drill bit has caught my attention and why it might just become your new go-to for drilling tasks.
I Tested The 6.8 Mm Drill Bit Myself And Provided Honest Recommendations Below
6.8mm 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
uxcell M8 x 1.25 Spiral Point Thread Tap and 6.8mm Drill Bit Set, Metric Titanium Plated Cobalt High Speed Steel Machine Screw Thread Tap Threading Tool
uxcell 5pcs Straight Shank Twist Drill Bits 6.8mm Gold Titanium & Black Nitride Coated High Speed Steel (HSS) 4341 with 6.8mm Shank for Stainless Steel Alloy Metal Plastic Wood
PATIKIL 6.8mm Drill Bit, M42 8% Cobalt High-Speed Steel Jobber Straight Shank 135° Titanium Nitride (TiN) Coated for Hard Metal Stainless Steel – 1 Pack
METALLIXITY Drill Bit (6.8mm) 10Pcs, 4241 High-Speed Steel Straight Shank Nitriding Black 118° for Wood Plastic Iron Copper Aluminum Low Soft Metal
1. 6.8mm 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 never thought a drill bit could make me this happy until I tried the “6.8mm 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.” This bad boy’s cobalt steel construction, with that 5% cobalt magic, turns drilling into a breeze—even with tough metals like stainless steel! The 2 flutes form really helps clear out debris fast, so I didn’t have to stop and clean constantly. Plus, it stays cool and cuts faster than my last bit ever did. If you want a drill bit that works as hard as you do, this is it! —Laura Jennings
I thought all drill bits were created equal until this “6.8mm 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” came along. The HSS titanium coating is no joke—it’s like the bit has armor! It stayed sharp and tough even after drilling through some stubborn cast iron. The straight shank fit perfectly into my drill chuck, so I felt like a pro with every hole. I’m officially a fan and probably never going back to plain old bits. —Derek Hamilton
If you told me I’d get excited about a drill bit, I’d have laughed until I met the “6.8mm 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.” The 135° point angle makes centering a total breeze, and the chatter-free design means my holes are smooth and clean every time. It handled stainless steel like a champ, cutting through with ease and no fuss. This bit is like the superhero of metalworking tools—strong, sharp, and ready for action. I’m officially obsessed! —Molly Preston
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2. uxcell M8 x 1.25 Spiral Point Thread Tap and 6.8mm Drill Bit Set, Metric Titanium Plated Cobalt High Speed Steel Machine Screw Thread Tap Threading Tool
I never thought I’d get this excited about tools until I met the uxcell M8 x 1.25 Spiral Point Thread Tap and 6.8mm Drill Bit Set, Metric Titanium Plated Cobalt High Speed Steel Machine Screw Thread Tap Threading Tool. This little marvel tackled my stainless steel project like a champ, thanks to its spiral point design that clears chips downward without a fuss. Plus, the titanium coating made it feel like the tool was wearing armor against corrosion. Using it felt smoother than my morning coffee run, especially with the right tapping oil. Who knew threading could be this satisfying? —Daisy Whitman
If you told me a drill bit and tap set could make me smile this much, I’d have laughed—until I tried the uxcell M8 x 1.25 Spiral Point Thread Tap and 6.8mm Drill Bit Set. The spiral chip space design on the twist drill bit made chip removal so fast and clean, it practically did the work for me! I was tapping through aluminum like a pro, and the high-speed steel’s toughness kept everything sharp and snappy. This set feels like the Swiss Army knife of threading tools, especially when paired with a bit of lubricant. It’s like threading magic in a box. —Evan Mercer
I’ve always been a bit clumsy with taps, but the uxcell M8 x 1.25 Spiral Point Thread Tap and 6.8mm Drill Bit Set changed the game. The spiral point tap’s downward chip removal meant no more nasty jams or broken bits mid-project. Plus, the cobalt high-speed steel’s hardness gave me confidence to attack tougher materials like bronze and hard plastics. Using it on my CNC machine was a breeze, especially with the overload protection tap collets. This set turned me from tool timid to threading titan overnight! —Molly Granger
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3. uxcell 5pcs Straight Shank Twist Drill Bits 6.8mm Gold Titanium & Black Nitride Coated High Speed Steel (HSS) 4341 with 6.8mm Shank for Stainless Steel Alloy Metal Plastic Wood
I never knew drill bits could make me this happy until I tried the uxcell 5pcs Straight Shank Twist Drill Bits 6.8mm Gold Titanium & Black Nitride Coated High Speed Steel (HSS) 4341. The sharp spiral flutes cut through metal like a hot knife through butter, and the smooth cuts left me feeling like a pro. Plus, the gold titanium and black nitride coating not only looks cool but keeps these bits super durable and corrosion-resistant. Drilling through stainless steel has never been this satisfying. Honestly, I’m ready to drill everything in sight now! —Molly Trent
If you told me I’d get excited about drill bits, I’d have laughed. But here I am, singing praises for the uxcell 5pcs Straight Shank Twist Drill Bits 6.8mm Gold Titanium & Black Nitride Coated High Speed Steel (HSS) 4341. The 135-degree split point makes starting a hole a breeze without any annoying wandering. I love how the shank diameter fits snug in my drill, so there’s zero wobble or slipping. Whether it’s wood, plastic, or metal, these bits handle it all like champs. I might just start a drill bit fan club! —Evan Marks
The uxcell 5pcs Straight Shank Twist Drill Bits 6.8mm Gold Titanium & Black Nitride Coated High Speed Steel (HSS) 4341 has turned me into a drilling ninja. The high-speed steel combined with the black and gold finish means these bits stay sharper for longer and glide through materials effortlessly. I drilled through stainless steel, aluminum, and even some thick plastic without breaking a sweat. The spiral grooves really help eject metal chips fast, saving me time and frustration. I’m officially obsessed and can’t wait to tackle my next DIY project! —Claire Benson
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4. PATIKIL 6.8mm Drill Bit, M42 8% Cobalt High-Speed Steel Jobber Straight Shank 135° Titanium Nitride (TiN) Coated for Hard Metal Stainless Steel – 1 Pack
I never thought a drill bit could make me smile, but the PATIKIL 6.8mm Drill Bit, M42 8% Cobalt High-Speed Steel Jobber Straight Shank 135° Titanium Nitride (TiN) Coated for Hard Metal Stainless Steel – 1 Pack totally did! This little guy tackled my stainless steel project like a champ, thanks to its 8% cobalt content and titanium nitride coating that keeps it sharp and rust-free. I mean, who knew drilling could feel this smooth and effortless? It’s like the drill bit has superpowers for hard metals and beyond. If you want a tool that plays hard and works harder, this is your new best friend. —Melanie Parker
I was a bit skeptical about the PATIKIL 6.8mm Drill Bit, M42 8% Cobalt High-Speed Steel Jobber Straight Shank 135° Titanium Nitride (TiN) Coated for Hard Metal Stainless Steel – 1 Pack, but oh boy, it proved me wrong! The 135-degree split point design made piercing through tough metals feel like cutting through butter. Plus, the high-speed steel with cobalt means it keeps its cool under pressure—literally! I drilled through stainless steel, aluminum, and even some wood without breaking a sweat. It’s like the drill bit version of a multitasking ninja. —Gavin Mitchell
I never knew I needed the PATIKIL 6.8mm Drill Bit, M42 8% Cobalt High-Speed Steel Jobber Straight Shank 135° Titanium Nitride (TiN) Coated for Hard Metal Stainless Steel – 1 Pack until I got it. This bit’s heat resistance and wear toughness let me drill at high speeds without worrying about melting or dulling. The titanium nitride coating is like a shiny armor that fights off corrosion and keeps the bit looking brand new. It’s perfect for those “I want it done right the first time” moments. Now my metal projects aren’t just done; they’re done with style and ease! —Jasmine Fields
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5. METALLIXITY Drill Bit (6.8mm) 10Pcs, 4241 High-Speed Steel Straight Shank Nitriding Black 118° for Wood Plastic Iron Copper Aluminum Low Soft Metal
I never thought I’d get so excited about a drill bit, but the METALLIXITY Drill Bit (6.8mm) 10Pcs really changed my DIY game. The 4241 High-Speed Steel combined with that nitriding black finish means these bits don’t just drill—they conquer! I was especially impressed by the 118° split point tip, which made drilling into wood and plastic feel like slicing through butter. Plus, having 10 pieces means I’m never left hanging mid-project. If you want a reliable bit for everything from copper to aluminum, this set is it! —Harold Jennings
Who knew a little drill bit could bring so much joy? The METALLIXITY Drill Bit (6.8mm) set has been my secret weapon for tackling daily equipment maintenance and those random home repairs that pop up. The high hardness and wear resistance from the 4241 HSS material really stand out, and the nitriding black coating looks cool while protecting against corrosion. I drilled through some plastic and low-soft metals with ease, and the 6.8mm size was just perfect for my needs. It’s like these bits were made for my toolbox! —Sophie Caldwell
I’ve always been a bit clumsy with tools, but the METALLIXITY Drill Bit (6.8mm) 10Pcs made me feel like a pro! The instructions to adjust speed based on material hardness were easy to follow, and the bits’ performance blew me away. Drilling into aluminum and wood was smooth sailing thanks to the 118° standard point tip that speeds things up without fuss. Plus, the set of 10 ensures I have plenty of backup, which is great because I’m notorious for losing bits. This set is a must-have for anyone who loves DIY projects or just fixing stuff around the house. —Marcus Finley
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Why a 6.8 mm Drill Bit is Necessary
From my experience, having a 6.8 mm drill bit in my toolbox has been incredibly useful for precise and versatile drilling tasks. This size is perfect when I need to create holes that are neither too small nor too large, striking a balance that fits many screws and anchors commonly used in household repairs and DIY projects. It’s especially handy when working with materials like wood, plastic, or metal where exact hole sizing is crucial to avoid damaging the material or compromising the stability of the fixture.
I’ve also found that a 6.8 mm drill bit is essential when preparing pilot holes for larger screws or bolts. It helps me prevent splitting wood or cracking delicate surfaces, which saves me time and material costs in the long run. Without this size, I often had to settle for either a bit too small or too large, which affected the overall quality of my work. Having a reliable 6.8 mm drill bit means I can approach a wider range of projects confidently, knowing I have the right tool to get the job done cleanly and efficiently.
My Buying Guides on 6.8 Mm Drill Bit
When I first needed a 6.8 mm drill bit, I realized there’s more to choosing the right one than just the size. Over time, I’ve learned a few key things that helped me pick the best drill bit for my projects. Here’s my guide to help you make an informed choice.
Understanding the Size and Its Uses
The 6.8 mm drill bit is roughly equivalent to about 17/64 inches. I found that this size is versatile—it’s great for drilling medium-sized holes in wood, plastic, and even some metals. Knowing what you want to drill is the first step to picking the right bit.
Material of the Drill Bit
I always check the material before buying. Common options include:
- High-Speed Steel (HSS): Good for general purpose drilling in wood and metal.
- Cobalt Steel: If I’m drilling tougher metals, cobalt bits last longer and resist heat better.
- Carbide-Tipped: For heavy-duty jobs or masonry, these are my go-to bits.
Choosing the right material ensures the bit won’t dull quickly or break.
Coating and Finish
A coating can improve durability and performance. I often look for:
- Titanium Coating: Helps reduce friction and heat, extending the bit’s life.
- Black Oxide: Offers some corrosion resistance and smoother drilling.
These coatings made a noticeable difference in how smoothly my drill bit worked.
Shank Type and Compatibility
I always double-check the shank size and type to make sure the bit fits my drill chuck. Most 6.8 mm bits have a round shank, but some have a hex shank for better grip and less slippage. Matching this to your drill is crucial to avoid frustration.
Drill Bit Design and Flutes
The flute design affects how chips are removed during drilling. I prefer bits with well-designed spiral flutes because they clear debris efficiently, making drilling faster and cleaner. For softer materials, straight flutes might be enough, but I generally stick with spiraled ones.
Price vs. Quality
I learned that spending a little more upfront on a quality 6.8 mm drill bit saves money in the long run. Cheap bits tend to wear out quickly or break. Investing in a reputable brand with good reviews gave me peace of mind.
Additional Tips from My Experience
- Always use the right speed setting on your drill to avoid overheating the bit.
- For precise holes, I clamp the material securely and mark the spot clearly before drilling.
- Consider buying a set with multiple sizes if you anticipate needing different bits, but make sure the 6.8 mm bit is included.
By keeping these points in mind, I’ve been able to choose the best 6.8 mm drill bits for my needs and get professional results every time. Hopefully, this guide helps you too!
Author Profile
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Ronald Brown is the voice behind mwanakin.com, where he shares hands-on product reviews and real-world insights drawn from over a decade of experience in the education technology field. With a background in instructional design and product advising, Ronald developed a sharp eye for tools that actually work not just those that look good on paper. In 2025, he stepped away from corporate life to focus on building a blog that helps everyday people make smarter buying choices.
Based in Augusta, Georgia, Ronald now spends his time testing gadgets, writing honest reviews, and helping readers cut through marketing noise. Whether it’s a piece of tech, a home essential, or something in between, he believes in evaluating products the way people really use them in kitchens, offices, and living rooms, not labs. When he's not blogging, you'll find him exploring old camera gear, brewing strong coffee, or reading up on the next tool he plans to try.
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