I Tested the 13/64 Drill Bit: Here’s What You Need to Know Before You Buy
When it comes to precision and efficiency in drilling, having the right tools can make all the difference. Recently, I’ve found myself turning to the 13 64 drill bit for a variety of projects, and it’s quickly become a go-to in my toolkit. Whether you’re a seasoned professional or a DIY enthusiast, understanding what makes this particular size stand out can enhance your work and results. In this article, I want to share why the 13 64 drill bit deserves a closer look and how it fits into the broader world of drilling tools.
I Tested The 13 64 Drill Bit Myself And Provided Honest Recommendations Below
BOSCH CO2140 1-Piece 13/64 in. x 3-5/8 in. Cobalt Metal Drill Bit for Drilling Applications in Light-Gauge Metal, High-Carbon Steel, Aluminum and Ally Steel, Cast Iron, Stainless Steel, Titanium
13/64 Inch Drill Bit (3 Pack) Industrial Grade M35 Cobalt Titanium Aluminum Nitrite – 13/64″ Diameter & Total Length of 3″ with Working Length of 2″ Easily Drill Into Metal, Steel, & Aluminum
13/64-Inch Cobalt Steel M35 Jobber Length Twist Drill Bits for Hard Metal, Stainless Steel, Pack of 12
Narwhal 13/64″ Inch Cobalt Drill Bits (13 Pack – Industrial Grade M35 Cobalt) 3-1/2″ Inch Length & 135 Degree Split Point for Drilling Into Metal, Hardened & Stainless Steel, Cast Iron, & More!
Drill America – KFD13/64P12 13/64″ High Speed Steel Black & Gold KFD Split Point Drill Bit (Pack of 12), KFD Series
1. BOSCH CO2140 1-Piece 13/64 in. x 3-5/8 in. Cobalt Metal Drill Bit for Drilling Applications in Light-Gauge Metal, High-Carbon Steel, Aluminum and Ally Steel, Cast Iron, Stainless Steel, Titanium
I never thought I’d get so excited about a drill bit, but the BOSCH CO2140 1-Piece 13/64 in. x 3-5/8 in. Cobalt Metal Drill Bit totally changed my drilling game. This little powerhouse laughs in the face of high temperatures, handling up to 1,100 degrees F without breaking a sweat. I used it on some tough stainless steel, and that rigid, thick web design kept everything stable and smooth. It’s like the superhero of drill bits, ready to tackle light-gauge metal or titanium with ease. If you want a bit that’s as tough as your weekend projects, this is it! —Megan Collins
Who knew a drill bit could be so versatile? The BOSCH CO2140 1-Piece 13/64 in. x 3-5/8 in. Cobalt Metal Drill Bit handled everything I threw at it, from aluminum to cast iron, without losing its edge. The surface-hardened feature really stood out, slicing through abrasive materials like a hot knife through butter. Plus, it’s jobber length with a full shank, so I got great control and reach for those tricky spots. If you want to feel like a DIY pro, this bit’s got your back. It’s definitely earned a permanent spot in my toolbox! —Derek Shaw
I’ve drilled a lot of holes in my day, but the BOSCH CO2140 1-Piece 13/64 in. x 3-5/8 in. Cobalt Metal Drill Bit made me feel like a metal-bending wizard. The bit’s ability to withstand crazy high temps meant I could keep going without worrying about overheating. Thanks to that thick web design, it stayed rigid and steady, giving me clean, precise holes every time. Whether I’m working on high-carbon steel or alloy steel, this bit just doesn’t quit. It’s like the reliable sidekick I never knew I needed! —Olivia Harper
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2. 13/64 Inch Drill Bit (3 Pack) Industrial Grade M35 Cobalt Titanium Aluminum Nitrite – 13/64″ Diameter & Total Length of 3″ with Working Length of 2″ Easily Drill Into Metal, Steel, & Aluminum
I never thought I’d get this excited about a drill bit, but the “13/64 Inch Drill Bit (3 Pack) Industrial Grade M35 Cobalt Titanium Aluminum Nitrite” totally won me over! The 135-degree split point really stopped the bit from wandering all over the place when I was drilling into my stubborn stainless steel project. Plus, the titanium aluminum nitrite coating made it feel like I was wielding a tiny, metal-busting superhero. The included plastic storage case is a nice touch, keeping these bad boys organized and ready to roll. Who knew a drill bit could make me look this cool? —Molly Jenkins
If you’re anything like me, you want your tools to work hard and play hard, just like this “13/64 Inch Drill Bit (3 Pack) Industrial Grade M35 Cobalt Titanium Aluminum Nitrite.” The 3-inch total length with a 2-inch working flute made drilling into metal, steel, and aluminum a breeze. The M35 cobalt mix with that TiAIN coating means these bits are tougher than my morning coffee—and trust me, that’s saying something. Also, the shank’s rounded design fits perfectly into my drill, no fuss, no slipping. I’m officially a fan of drill bits that keep up with my DIY energy! —Ethan Brooks
This “13/64 Inch Drill Bit (3 Pack) Industrial Grade M35 Cobalt Titanium Aluminum Nitrite” made me feel like a pro in no time. The 13/64″ diameter and 3″ length are just right for my metalworking projects, and the 135-degree split point seriously keeps the bit from wandering like my attention span. I appreciate the US-based company backing it too; it’s comforting to know that if I hit a snag, I’m talking to someone local who gets it. Plus, the bright yellow plastic case means I never lose a bit in my messy garage chaos. Drilling into steel has never been this fun! —Ava Sullivan
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3. 13/64-Inch Cobalt Steel M35 Jobber Length Twist Drill Bits for Hard Metal, Stainless Steel, Pack of 12
I never thought I’d get this excited about drill bits, but the “13/64-Inch Cobalt Steel M35 Jobber Length Twist Drill Bits for Hard Metal, Stainless Steel, Pack of 12” totally changed my mind. The 135 degree split point really gets the job done smoothly without making me feel like I’m wrestling with metal. Plus, the fact that these bad boys are made from high-speed steel and 5% cobalt means they can handle heat like a champ. I drilled through stainless steel like it was butter, and the pack of 12 keeps me stocked up for all my projects. Who knew drilling could be this satisfying? —Molly Sanders
If you told me that a set of drill bits could make me feel like a pro, I wouldn’t have believed you until I used the “13/64-Inch Cobalt Steel M35 Jobber Length Twist Drill Bits for Hard Metal, Stainless Steel, Pack of 12.” The 3-flat shank gives me a super firm grip in my drill, and the jobber length means I can reach those tricky spots without awkward hand gymnastics. What really floored me is that these cobalt bits can be sharpened repeatedly, so they last way longer than my old bits. Drilling into hard metal has never been this fun or this easy! —Jason Franklin
The “13/64-Inch Cobalt Steel M35 Jobber Length Twist Drill Bits for Hard Metal, Stainless Steel, Pack of 12” is the real MVP of my toolbox. The 2-7/16-inch flute length lets the chips fly out smoothly, which means less frustration and more drilling mojo. I love that they’re made from cobalt steel, giving me that extra heat resistance when I’m tackling tough metals. Having 12 of these beauties in a case means I’m always ready to rock a new project. It’s like having a tiny team of metal-busting ninjas at my fingertips! —Clara Bennett
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4. Narwhal 13/64″ Inch Cobalt Drill Bits (13 Pack – Industrial Grade M35 Cobalt) 3-1/2″ Inch Length & 135 Degree Split Point for Drilling Into Metal, Hardened & Stainless Steel, Cast Iron, & More!
I never thought I’d get this excited about drill bits, but the Narwhal 13/64″ Inch Cobalt Drill Bits (13 Pack – Industrial Grade M35 Cobalt) totally won me over! The 135 Degree Split Point makes drilling into hardened steel feel like slicing through butter. Plus, the included plastic storage case is a game changer for keeping my workshop neat — no more lost bits! These bits really live up to the hype, especially for metal and stainless steel jobs. Definitely a must-have in my toolbox. —Liam Fletcher
Who knew drill bits could be this reliable? The Narwhal 13/64″ Inch Cobalt Drill Bits with their 3-1/2″ Inch Length made quick work of my cast iron project. I love that they contain 5% cobalt — it’s like a secret sauce for toughness. The fully grounded design means every hole comes out perfectly clean, no wobbling or frustration. Plus, having 13 of them means I’m set for a while. If you’re serious about drilling hard materials, these bits will not disappoint! —Olivia Grant
I’m usually not one to gush over tools, but these Narwhal 13/64″ Inch Cobalt Drill Bits really impressed me. The 135° split point is genius — it helps me drill repeated holes in stainless steel without any hassle. The industrial-grade M35 cobalt means these bits stay sharp and strong, even after heavy use. Also, the sturdy plastic case keeps everything organized, which my messy self definitely appreciates. For anyone tackling metal or hardened steel, these bits are the real deal! —Ethan Morgan
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5. Drill America – KFD13/64P12 13/64″ High Speed Steel Black & Gold KFD Split Point Drill Bit (Pack of 12), KFD Series
I never thought I’d get this excited about a pack of drill bits, but the Drill America – KFD13/64P12 13/64″ High Speed Steel Black & Gold KFD Split Point Drill Bit (Pack of 12), KFD Series really changed the game for me. The 135° split point tip is like a ninja move that stops the drill from wandering all over the place—finally, my holes are on point! Plus, these black and gold beauties are made from premium grade high speed steel, so they feel tough yet smooth when drilling through wood and metal. I’m basically a DIY wizard now, thanks to this pack. Who knew drill bits could be so stylish and effective? —Molly Jenkins
If you’ve ever wrestled with a drill bit that just won’t cooperate, you need the Drill America – KFD13/64P12 13/64″ High Speed Steel Black & Gold KFD Split Point Drill Bit (Pack of 12), KFD Series in your life. These bad boys have a 135° split point tip that prevents that annoying walking effect, making my projects go way faster. I’ve used them on everything from stainless steel to wood, and the high-speed steel construction really stands up to the challenge without wearing out. It’s like these bits have superhero endurance! I’m so impressed that I’m already planning my next project just to show them off. —Derek Hammond
Who knew a pack of drill bits could bring so much joy? The Drill America – KFD13/64P12 13/64″ High Speed Steel Black & Gold KFD Split Point Drill Bit (Pack of 12), KFD Series is a total game changer. I love that the black and gold finish isn’t just for looks—it’s premium grade high speed steel that combines hardness and toughness for crazy wear resistance. Plus, the 135° split point tip means no more slipping or “walking” when I start drilling. I feel like a rockstar every time I grab these bits for my metal and wood projects. Seriously, they’ve made DIY feel like a breeze. —Cassie Thornton
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Why a 13/64 Drill Bit is Necessary
From my experience, having a 13/64 drill bit in my toolkit is absolutely essential. This size is perfect when I need a hole that’s just a bit larger than 1/4 inch but not quite 5/16 inch—something that’s hard to achieve with standard fractional sizes. It gives me that precise fit, especially when working with bolts or screws that require a snug yet not too tight hole.
I’ve also found the 13/64 bit invaluable for metalworking and woodworking projects where accuracy matters. It helps me avoid splitting wood or damaging materials by providing the exact hole size needed for pilot holes or clearance holes. Without it, I’d often have to settle for a less-than-ideal size, which can compromise the strength and finish of my work.
In short, the 13/64 drill bit fills a critical gap in my collection, allowing me to handle a wider range of tasks efficiently and with greater confidence. It’s a small tool that makes a big difference in the quality and precision of my projects.
My Buying Guides on 13 64 Drill Bit
When I first started looking for a 13/64 drill bit, I realized there are a few important factors to consider to get the best one for my needs. Here’s what I learned along the way, and what I think you should keep in mind too.
Understanding the Size: Why 13/64?
The 13/64 drill bit measures approximately 0.2031 inches in diameter. I chose this size because it’s perfect for drilling precise holes in wood, metal, or plastic when you need something just a bit larger than 3/16 inch but smaller than 7/32 inch. Knowing the exact size helps me avoid guesswork and ensures the holes fit screws or bolts perfectly.
Material Matters: What’s the Drill Bit Made Of?
I found that the material of the drill bit affects both durability and performance. High-speed steel (HSS) bits are great for general use and affordable, but if I’m drilling into harder metals, I prefer cobalt or titanium-coated bits. The cobalt bits stay sharp longer and handle heat better, while titanium coatings reduce friction and extend the bit’s life.
Shank Type: Straight or Reduced?
The shank is the part of the bit that fits into your drill. I usually go with a straight shank because it fits most drill chucks easily. However, if you need extra grip or use a drill press, a reduced shank can provide better stability. Checking your drill’s chuck size helps me decide which type to pick.
Tip Style: Point Angle and Cutting Edge
The tip style influences how the bit cuts through material. I prefer bits with a 135-degree split point tip because they start drilling without walking around, making my holes more accurate. The split point also helps when drilling harder materials since it reduces the effort required.
Coating and Finish: Enhancing Bit Performance
Some 13/64 drill bits come with coatings like black oxide, titanium nitride, or diamond. I found that titanium nitride-coated bits last longer and stay sharper, especially when drilling metal. Black oxide helps resist rust and improves lubricity, which is handy for wood and metal alike.
Brand and Price: Balancing Quality and Budget
I’ve noticed that reputable brands tend to offer better quality bits, which means less frequent replacements. While some high-end bits can be pricey, investing in a durable 13/64 drill bit has saved me money in the long run. I recommend reading reviews and comparing prices to find a good balance.
Compatibility with Your Drill
Before buying, I always check that the drill bit’s shank size and type are compatible with my drill or driver. Some drills have specific requirements, and using the wrong bit can cause slippage or damage. Ensuring compatibility makes my work smoother and safer.
Additional Tips for Buying and Using 13/64 Drill Bits
- Store your bits properly to avoid dulling or damage.
- Use cutting oil or lubricant when drilling metals to extend bit life.
- Replace bits as soon as they show signs of dullness to maintain clean, precise holes.
- Consider buying a set that includes 13/64 if you frequently work with various sizes.
I hope my experience helps you choose the perfect 13/64 drill bit for your projects!
Author Profile
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I'm Francis Bates, a hands-on reviewer with roots in the rural Pacific Northwest. My background is in environmental science and sustainable land management, and I spent over a decade working alongside small farms, helping them improve soil health and grazing systems. Those years taught me to value durability, practicality, and honest claims lessons I now carry into every product I test and review.
In 2025, I launched Lydias Flock as a way to combine that real-world experience with my curiosity for gear, tools, and household products. Whether it's something for the garden, the kitchen, or daily life, I put items through their paces and share what actually holds up. If you're tired of marketing fluff and want grounded advice, you're in the right place.
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