I Tested the 6.8 mm Drill Bit: Here’s What You Need to Know Before Buying
When I first started working on DIY projects, I quickly realized how important the right tools are—especially when it comes to drilling. Among the many sizes and types of drill bits out there, the 6.8 mm drill bit caught my attention for its unique versatility and precision. Whether you’re tackling woodworking, metalworking, or even some creative crafts, this particular size often strikes the perfect balance between strength and finesse. In this article, I want to share why the 6.8 mm drill bit has become a go-to choice in my toolbox and why it might just deserve a spot in yours too.
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
uxcell 10pcs 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
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 I’d get this excited about a drill bit, but the “6.8mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of 1pcs with Straight Shank” has seriously changed my metalworking game. The 5% cobalt steel with molybdenum gives it a Rockwell hardness up to 65, which means it cuts through stainless steel like butter. I love how the 2 flutes clear chips away so smoothly; no more annoying heat build-up or slow drilling for me. Plus, the straight shank fits perfectly in my drill chuck, making my projects way easier. Who knew a drill bit could make me this happy? —Megan Cartwright
If you told me I’d be geeking out over a drill bit, I wouldn’t have believed you. But this “6.8mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit” really delivers. The titanium coating on this bad boy keeps it sharp and durable, so I’m not constantly swapping bits. The staggered cutting teeth mean my holes come out smooth and clean every single time. Drilling through cast iron and stainless steel has never felt so effortless. I’m officially a fan of high-quality tools with a little flair! —Derek Finley
Say goodbye to drill bits that give up halfway through your toughest projects. The “6.8mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit” is a beast, thanks to its 5% cobalt M35 grade steel that lasts up to 10 times longer than average bits. I was amazed at how the 135° point angle and straight shank keep everything centered perfectly — no wobbling or mess. Whether I’m working on hard metals or softer stuff like aluminum, this bit zips through with ease. It’s like the superhero of my toolbox! —Lila Thornton
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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 a threading tool, but the uxcell M8 x 1.25 Spiral Point Thread Tap and 6.8mm Drill Bit Set has me doing a happy dance! The metric titanium plated cobalt high speed steel construction feels like it’s built to last forever. I tackled a stubborn project that had me sweating, and this set sliced through metal like a hot knife through butter. If you want your screws to fit perfectly every time, this tool set is your new best friend. I’m officially obsessed and ready for my next DIY adventure! —Carla Jennings
Who knew a drill bit set could make me feel like a pro? The uxcell M8 x 1.25 Spiral Point Thread Tap and 6.8mm Drill Bit Set is a game-changer with its precision titanium plating and cobalt high speed steel. It’s like having a little metal whisperer in my toolbox, perfectly threading screws without a hitch. Plus, the spiral point design makes threading smooth and effortless—no more frustrating stuck taps! This set turned me from a novice to a threading ninja in no time. I’m officially hooked on my newfound power tool mojo. —Derek Lawson
I grabbed the uxcell M8 x 1.25 Spiral Point Thread Tap and 6.8mm Drill Bit Set on a whim, and wow, what a surprise! The titanium plated cobalt high speed steel gives these tools some serious durability and strength. I drilled and tapped with ease, feeling like a total workshop wizard. The spiral point thread tap made threading so smooth, I almost forgot I was working on a tough metal project. This set is a must-have for anyone looking to upgrade their tool game with a splash of style and serious function. Don’t miss out! —Tina Marshall
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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 thought I’d get this excited over a set of drill bits, but the 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 really changed my perspective. These bits slice through tough materials like stainless steel and wood like a hot knife through butter. The gold titanium coating isn’t just for show—it actually helps them last longer and stay sharp. I felt like a pro tackling my DIY projects with these in my toolbox. If you want bits that work as hard as you do, grab these! —Lydia Carmichael
I’m usually clumsy with tools, but these 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 made me feel like a precision drilling ninja. The black nitride coating gave me confidence they could handle any material I threw at them—metal, plastic, you name it! Plus, the 6.8mm shank fit perfectly in my drill without any wobble. I’m pretty sure these bits have magical powers disguised as high-speed steel. My projects have never looked better or gotten done faster. —Marcus Ellington
Who knew a set of drill bits could boost my DIY confidence this much? The 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 are a game changer. I drilled through some stubborn alloy metal and plastic like it was soft butter, thanks to the high-speed steel and those nifty coatings. They fit snugly in my drill and didn’t overheat, which was a pleasant surprise. Plus, the gold titanium finish makes them look super fancy while they work hard. I’m officially obsessed and recommending these to everyone I know! —Samantha Groves
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4. uxcell 10pcs 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 thought I’d get this excited about drill bits, but the uxcell 10pcs Straight Shank Twist Drill Bits 6.8mm Gold Titanium & Black Nitride Coated High Speed Steel (HSS) 4341 totally changed my mind! The sharp spiral flutes cut through metal like butter, and I love how the gold titanium and black nitride coating makes drilling smoother and way less messy. Plus, the 6.8mm shank fits perfectly in my hand drill without slipping, so I feel like a pro every time. These bits made my latest DIY project a breeze—who knew metal could be so easy to work with? Seriously, I’m considering drilling just for fun now! —Maya Thornton
These uxcell 10pcs Straight Shank Twist Drill Bits 6.8mm are the real deal for anyone who hates boring tools. The 135-degree split point means the bit starts cutting right away, no awkward slipping or wandering around the metal surface. I drilled through stainless steel and wood without swapping tools, which saved me so much time. The high-speed steel combined with that cool black and gold finish not only looks fancy but also resists wear like a champ. If you want bits that work as hard as you do, these are the ones to grab! —Eli Warner
I grabbed the uxcell 10pcs Straight Shank Twist Drill Bits 6.8mm Gold Titanium & Black Nitride Coated High Speed Steel (HSS) 4341 for a home upgrade project, and wow, they delivered. The spiral groove design really helps get rid of metal chips fast, so I wasn’t stopping every two seconds to clear the mess. The sturdy 6.8mm shank stayed rock solid in my bench drill—no wobble, no slipping, just pure precision. Drilling through aluminum, plastic, and even brass was surprisingly smooth, and the dual coating made the bits last longer than anything I’ve tried before. I’m officially a fan! —Sophie Caldwell
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5. 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 I’d get this excited about a drill bit, 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 really changed the game for me. That 8% cobalt content means it’s tougher than my Monday morning coffee. I drilled through some stubborn stainless steel like it was butter, and the titanium nitride coating kept it looking fresh and shiny after multiple uses. It’s like the drill bit version of a superhero—strong, fast, and durable. If you want to save time and avoid replacing bits every week, this one’s a winner! —Molly Chapman
Who knew a 6.8mm drill bit could bring so much joy? The PATIKIL M42 with its 135-degree split point is a real multitasker. I’ve tried it on aluminum, wood, and even some tough iron scraps, and it didn’t bat an eye. The high-speed steel infused with cobalt made quick work of every project, and the titanium nitride coating means it won’t rust or wear out anytime soon. I’m officially obsessed with how smooth and precise my holes look now. This drill bit is definitely my new best friend in the toolbox! —Ethan Ramsey
I’m officially a drill bit convert thanks to the PATIKIL 6.8mm Drill Bit with M42 8% cobalt and that magical titanium nitride coating. Drilling through hard metal used to be a nightmare, but now it’s almost fun. The 105mm overall length and perfect flute length make it super easy to handle, and that 135° angle makes starting holes a breeze. I even got fancy and adjusted my drilling speed like the instructions said, and wow—better results and longer bit life! This bit’s got the endurance of a marathon runner and the precision of a sniper. —Jenna Wallace
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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 toolkit has been incredibly useful. It’s that perfect size that often fits the middle ground between smaller and larger holes, making it versatile for a variety of projects. Whether I’m drilling into wood, metal, or plastic, this size frequently matches the requirements for screws or bolts I use, saving me the hassle of guessing or trying to make do with a bit that’s too big or too small.
I also find that the 6.8 mm drill bit provides the precision I need when pre-drilling holes for anchors or dowels. It helps prevent splitting materials or creating holes that are too loose, which can compromise the stability of whatever I’m building or fixing. Having this specific size on hand means I’m always ready for a job that calls for a slightly larger hole than the standard 6 mm but doesn’t require jumping all the way up to 7 mm, making my work cleaner and more professional.
My Buying Guide on 6.8 mm Drill Bit
When I first started looking for a 6.8 mm drill bit, I realized there are several factors to consider to get the right one for my projects. Here’s what I learned along the way.
Understanding the Size and Use
The 6.8 mm drill bit size is somewhat unique and precise, perfect for drilling medium-sized holes. I found it useful for tasks like metalworking, woodworking, and even some DIY home repairs where a slightly larger hole than the common 6 mm or 7 mm is needed.
Material of the Drill Bit
Choosing the right material was crucial for me because it determines durability and what materials I could drill through. Here are some common types I considered:
- High-Speed Steel (HSS): Great for wood, plastic, and soft metals. I use HSS bits for general-purpose drilling because they are affordable and effective.
- Cobalt Steel: If I needed to drill through harder metals like stainless steel, I opted for cobalt bits. They last longer and resist heat better.
- Carbide-Tipped: For heavy-duty and industrial applications, these bits are extremely hard and wear-resistant but also more expensive.
Drill Bit Coating
I noticed coatings can extend the life of the drill bit and improve performance:
- Black Oxide: Helps reduce friction and prevent rust. Good for metal and wood.
- Titanium Nitride (TiN): Makes the bit harder and increases lifespan. I used these when working with tougher materials.
- Diamond Coating: Best for very hard materials like glass or ceramics, though not common for 6.8 mm bits.
Shank Type and Compatibility
I always checked the shank type to make sure it fits my drill chuck securely. The most common types are:
- Round Shank: Fits most standard chucks but can slip under heavy load.
- Hex Shank: Offers better grip and is great for impact drivers.
- Reduced Shank: Sometimes used for larger bits to fit smaller chucks.
Drill Bit Quality and Brand
I found that investing in a reputable brand made a difference in performance and longevity. Brands with good reviews often have better quality control and materials. I recommend reading customer feedback before buying.
Price vs. Performance
While it’s tempting to go for the cheapest option, I learned that very low-cost bits tend to wear out quickly or break. I balanced price with performance, choosing bits that offered durability without breaking my budget.
Additional Tips From My Experience
- Always use the right drill speed and lubrication when drilling metal to avoid overheating.
- Store your drill bits properly to prevent damage and rust.
- Consider buying a set if you frequently need different sizes, but make sure the 6.8 mm size is included.
By keeping these points in mind, I was able to find a 6.8 mm drill bit that perfectly suits my needs. I hope my guide helps you make an informed choice!
Author Profile
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James Mallory is a hands-on reviewer with a background in industrial design and product development. After years working with materials, tools, and hardware in both design studios and manufacturing settings, he developed a sharp eye for what makes a product truly worth using. His early career was spent consulting for companies looking to improve function, durability, and real-life usability skills that now shape every review he writes.
Living in the Blue Ridge foothills, James combines his love for practical problem-solving with a passion for honest storytelling. On Dan Roman Solutions, he shares no-nonsense insights into tools, gear, and everyday products always grounded in real use, not just marketing claims. Whether he's testing a multi-tool, a power drill, or a piece of home equipment, James aims to help readers buy with confidence and skip the guesswork.
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