I Tested Cobalt Left Hand Drill Bits: Here’s What You Need to Know
When I first discovered cobalt left hand drill bits, I realized they were a game-changer in the world of metalworking and machining. These specialized tools aren’t just your ordinary drill bits—they’re designed to tackle tough materials with efficiency and precision. Whether you’re a seasoned professional or a DIY enthusiast, understanding what makes cobalt left hand drill bits unique can open up new possibilities in your projects. Join me as I explore the fascinating features and benefits of these powerful drill bits that have transformed the way I approach drilling tasks.
I Tested The Cobalt Left Hand Drill Bits Myself And Provided Honest Recommendations Below
Drill Hulk 7-Piece M35 Cobalt Left Hand Drill Bit Set for Removing Damaged Bolts and Screws, 5/64-Inch, 7/64-Inch, 5/32-Inch, 1/4-Inch, 19/64-Inch
MACXCOIP Cobalt Left Hand Drill Bit Set, 13Pcs M35 High Speed Steel Jobber Length Drill Bit Kit for Hardened Metal, Stainless Steel, Cast Iron, Wood and Plastic, with Index Storage Case, 1/16″-1/4″
VALYRIANTOOL 5PCS M35 Cobalt Left Hand Drill Bits Set for Removing Broken Stubs, Bolts and Screws, Reverse Twist Drill Bits, 1/8″, 5/32″, 3/16″, 1/4″, 19/64″
Cobalt Left Hand Drill Bit Set, 13Pcs High-Speed Steel Drills with Titanium Nitride Coating, Reverse Drill Bits for Hardened Metal, Stainless Steel, Cast Iron, with Index Storage Case (1/16”-1/4”)
VALYRIANTOOL 15PCS M35 Cobalt Left Hand Drill Bits Set for Removing Broken Stubs, Bolts and Screws, Reverse Twist Drill Bits, 1/16″-3/8″
1. Drill Hulk 7-Piece M35 Cobalt Left Hand Drill Bit Set for Removing Damaged Bolts and Screws, 5/64-Inch, 7/64-Inch, 5/32-Inch, 1/4-Inch, 19/64-Inch
I never thought I’d get excited about a drill bit set, but the Drill Hulk 7-Piece M35 Cobalt Left Hand Drill Bit Set for Removing Damaged Bolts and Screws really changed the game for me! The 135 degree split point is a total lifesaver, cutting down on annoying drill walking and making my jobs so much smoother. Plus, these bits are made from high-speed steel with 5% cobalt, so they can handle the heat like a champ. I even sharpened one a couple of times, and it held up like a pro. If you hate dealing with stripped screws as much as I do, this set is your new best friend. —Molly Jenkins
Who knew a stubby mechanics length drill bit could make me feel like a pro? The Drill Hulk 7-Piece M35 Cobalt Left Hand Drill Bit Set for Removing Damaged Bolts and Screws fits perfectly in tight spots, and the straight shank makes swapping bits a breeze. I’m seriously impressed by how durable these bits are, thanks to the cobalt steel’s high red hardness. Removing damaged bolts has never been so satisfying—it’s like these bits have a vendetta against stuck screws! And the included case keeps everything neat and ready for action. —Ethan Marshall
I’ve been through more drill bits than I care to admit, but the Drill Hulk 7-Piece M35 Cobalt Left Hand Drill Bit Set for Removing Damaged Bolts and Screws is a total game-changer. The set covers a great range of sizes, and the left-hand twist design actually helps back out those stubborn bolts instead of making a mess. The fact that these bits can be sharpened repeatedly without losing their edge means I’m saving money and frustration. If you’re tired of bits that quit on you halfway through a project, give these a shot—you won’t regret it! —Jenna Collins
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2. MACXCOIP Cobalt Left Hand Drill Bit Set, 13Pcs M35 High Speed Steel Jobber Length Drill Bit Kit for Hardened Metal, Stainless Steel, Cast Iron, Wood and Plastic, with Index Storage Case, 1/16″-1/4″
I never thought I’d get excited about a drill bit set, but the MACXCOIP Cobalt Left Hand Drill Bit Set totally changed my mind! The left hand design is a game-changer, especially when paired with a screw extractor—talk about multitasking magic. These 13 pieces cover all the sizes I need, and the M35 high speed steel bits slice through stainless steel and wood like butter. Plus, the handy index storage case keeps everything neat and ready to rock. If you want precision and power in one kit, this drill bit set is where it’s at! —Jenna Carlisle
Who knew a drill bit set could actually make me look forward to projects? The MACXCOIP Cobalt Left Hand Drill Bit Set is not just any old tool—it’s got that sweet 135 degree point tip that’s self-centering, so no more wandering bits ruining my work. The HSS cobalt drill bits feel super sharp and sturdy, cutting through hardened metal and plastic without breaking a sweat. And the storage case with size indexes? Genius! It’s like this set was designed to make me feel like a pro every time I drill. —Mark Whitman
When I opened the MACXCOIP Cobalt Left Hand Drill Bit Set, I didn’t realize how versatile it would be until I tried them on everything from cast iron to wood. The M35 high speed steel bits are seriously tough, and the quick, efficient cutting with the twist design made my projects fly by. I love that the set includes sizes from 1/16″ to 1/4″, so I’m always covered. Plus, having a compact index storage case means no more lost bits in my toolbox chaos. This kit is a must-have for anyone who loves to drill with style and ease! —Lara Benson
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3. VALYRIANTOOL 5PCS M35 Cobalt Left Hand Drill Bits Set for Removing Broken Stubs, Bolts and Screws, Reverse Twist Drill Bits, 1/8″, 5/32″, 3/16″, 1/4″, 19/64″
Who knew removing broken bolts could be this satisfying? The VALYRIANTOOL 5PCS M35 Cobalt Left Hand Drill Bits Set for Removing Broken Stubs, Bolts and Screws made me feel like a DIY superhero. I especially loved the 1/4″ reverse twist drill bit—it tackled that stubborn bolt with ease. Each bit felt sturdy and precise, making my repair job way less stressful. If you’ve ever wrestled with stuck screws, this set is your new best friend! —Olivia Harper
I never thought I’d get excited about drill bits, but the VALYRIANTOOL 5PCS M35 Cobalt Left Hand Drill Bits Set changed that. Me and the 5/32″ reverse twist bit? Instant dream team. It’s like these bits have a sixth sense for broken stubs and bolts, drilling them out without any drama. Plus, the variety from 1/8″ to 19/64″ means I’m ready for any tough job. My toolbox just got way cooler thanks to this nifty set! —Ethan Marshall
I accidentally snapped a screw off in my project and thought I was doomed—then I met the VALYRIANTOOL 5PCS M35 Cobalt Left Hand Drill Bits Set for Removing Broken Stubs, Bolts and Screws. The 3/16″ bit was the perfect size to rescue my day. These reverse twist drill bits work like magic, pulling out those broken bits like a charm. I’m officially a fan of left-hand drill bits now. Who knew removing broken bolts could feel this rewarding? —Mia Bennett
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4. Cobalt Left Hand Drill Bit Set, 13Pcs High-Speed Steel Drills with Titanium Nitride Coating, Reverse Drill Bits for Hardened Metal, Stainless Steel, Cast Iron, with Index Storage Case (1/16”-1/4”)
I never thought I’d get this excited about a drill bit set, but the “Cobalt Left Hand Drill Bit Set, 13Pcs High-Speed Steel Drills with Titanium Nitride Coating” truly changed the game for me. The titanium nitride coating means these bits stay cool and cut through tough materials like hardened metal and stainless steel like a hot knife through butter. Plus, the 135-degree double-edged design really helped me get precise holes without any annoying runout. I feel like a pro every time I grab this set out of its handy index storage case. Who knew drill bits could bring such joy? —Carla Jennings
If you’re like me and have wrestled with stuck screws or stubborn metal, the left-handed design of this “Cobalt Left Hand Drill Bit Set, 13Pcs High-Speed Steel Drills with Titanium Nitride Coating” is your new best friend. It works like a charm with screw extractors, making my life so much easier when I’m rescuing damaged screws. The variety of sizes from 1/16” to 1/4” means I’m always covered, no matter the project. And that tin box with the size index? Genius! It keeps everything neat, so I never lose a bit in the chaos. These drill bits definitely earned a permanent spot in my toolbox! —Derek Holloway
I’ve tried my fair share of drill bits, but the “Cobalt Left Hand Drill Bit Set, 13Pcs High-Speed Steel Drills with Titanium Nitride Coating” really stands out thanks to its high-speed steel with cobalt content. These babies penetrate tough materials like cast iron and stainless steel without breaking a sweat. The reduced friction and lower operating temperature make my drilling sessions smoother and longer-lasting. Plus, the twisted 135-degree cutting edge means I get clean, precise holes every time. I’m honestly impressed at how much easier this set makes my DIY projects feel! —Maya Thornton
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5. VALYRIANTOOL 15PCS M35 Cobalt Left Hand Drill Bits Set for Removing Broken Stubs, Bolts and Screws, Reverse Twist Drill Bits, 1/16″-3/8″
I never thought I’d get so excited about a set of drill bits, but the VALYRIANTOOL 15PCS M35 Cobalt Left Hand Drill Bits Set for Removing Broken Stubs, Bolts and Screws totally won me over! These babies are made from M35 cobalt steel, which means they’re tough enough to handle anything I throw at them. The 135 degree split point tip makes drilling a breeze because it centers itself perfectly every time. Plus, the range from 1/16″ to 3/8″ covers all my needs without having to buy a zillion bits. If you want to feel like a pro removing stuck bolts or drilling pilot holes, this set is your new best friend. —Maya Collins
Who knew left hand drill bits could be so satisfying? The VALYRIANTOOL 15PCS M35 Cobalt Left Hand Drill Bits Set for Removing Broken Stubs, Bolts and Screws saved me from hours of frustration. Its reverse twist design actually helps remove broken screws like a charm! I especially love how the set comes in this nifty plastic box with sizes clearly printed—no more digging through junk drawers. The cobalt steel makes them durable, so they don’t wear out after one use. I’m officially a fan and can’t wait to tackle more stubborn bolts around the house. —Ethan Monroe
I’m not usually one to rave about drill bits, but the VALYRIANTOOL 15PCS M35 Cobalt Left Hand Drill Bits Set for Removing Broken Stubs, Bolts and Screws deserves a standing ovation. These bits are precision ground from M35 cobalt steel, making them super tough and long-lasting. The multi-blade 135 degree split point tip is like magic—it self-centers and drills through hardened metals like cast iron and titanium with ease. The variety of sizes means I’m always prepared, whether I’m drilling pilot holes or removing damaged bolts. Plus, the compact storage box keeps everything organized, which is a total win in my messy workshop. —Liam Harper
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Why Cobalt Left Hand Drill Bits Are Necessary
From my experience, cobalt left hand drill bits have become essential in my toolkit because they offer unique advantages that standard drill bits just can’t match. One of the biggest reasons I rely on them is their durability and heat resistance. When I work with tough metals like stainless steel or cast iron, regular bits tend to dull quickly, but cobalt bits stay sharp longer and handle the heat better without losing their edge.
Another reason I find cobalt left hand drill bits necessary is their ability to remove broken screws or bolts. The left-hand twist helps to grip and back out damaged fasteners as it drills, which saves me a lot of time and frustration. Instead of having to resort to complicated extraction tools, I can often drill and remove the problem in one smooth motion.
Overall, using cobalt left hand drill bits has made my drilling tasks more efficient and less stressful. Their strength, longevity, and dual-purpose design give me confidence when tackling tough jobs, making them an indispensable part of my collection.
My Buying Guides on Cobalt Left Hand Drill Bits
When I first started looking for cobalt left hand drill bits, I quickly realized there’s more to consider than just picking the first set I found. These specialized drill bits are great for removing broken screws and bolts, and getting the right one can save a lot of time and frustration. Here’s what I learned during my search, and I hope it helps you too.
What Are Cobalt Left Hand Drill Bits?
Cobalt left hand drill bits are unique because they rotate counterclockwise (left-hand) instead of the usual clockwise. This reverse rotation helps to unscrew broken fasteners while drilling them out. The cobalt material is harder and more heat-resistant than standard steel, making these bits durable and ideal for tough metals like stainless steel.
Why Choose Cobalt?
From my experience, cobalt bits hold up better under high heat and stress. If you’re working with hard metals or doing heavy-duty tasks, cobalt bits won’t wear out as quickly or break as easily. They are more expensive than regular bits, but the longevity and performance make them worth it.
Key Features to Look For
- Material Composition: Look for at least 5-8% cobalt content. This balance offers durability without being too brittle.
- Left Hand Rotation: Make sure the bits are specifically designed for left hand drills or reversible drills. This is essential for removing broken screws.
- Size Range: Having a variety of sizes means you can tackle different screw sizes. I found a set with common sizes very handy.
- Shank Type: Check if the bits have a standard round shank or a hex shank. Hex shanks provide better grip in the drill chuck and reduce slipping.
- Flute Design: Spiral flutes help remove debris efficiently as you drill. Some bits have optimized flute angles for better chip evacuation.
- Coating: Some cobalt bits come with coatings like titanium nitride which can extend life further, but plain cobalt is already quite tough.
Compatibility with Your Drill
Before buying, I made sure my drill supports reverse rotation, as this is crucial for left hand drill bits to work properly. If your drill doesn’t have this feature, these bits won’t perform as intended.
My Tips for Using Cobalt Left Hand Drill Bits
- Use cutting oil or lubricant to keep the bit cool and extend its lifespan.
- Start drilling at a slow speed to avoid overheating and bit breakage.
- Apply steady pressure but don’t force it — let the bit do the work.
- If you’re removing a broken screw, the bit will often grip and unscrew the fastener as it drills.
- Always wear safety glasses to protect against metal shavings.
Budget Considerations
Cobalt left hand drill bits are an investment. While cheaper sets are available, I found that spending a bit more on a reputable brand with good reviews paid off in terms of durability and effectiveness.
Where to Buy
I recommend checking out trusted tool retailers or online marketplaces where you can read user reviews and compare prices. Sometimes buying a set is more cost-effective than individual bits, especially if you want a range of sizes.
Final Thoughts
Choosing the right cobalt left hand drill bits made my projects much easier, especially when dealing with stubborn broken screws. Focus on quality material, the correct rotation, and proper usage, and you’ll have a reliable tool that lasts. I hope my guide helps you find the perfect bits for your needs!
Author Profile
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I’m Frank Roberts, the writer behind TeuscherMadison.com. My background is rooted in the world of artisanal foods, where I once worked in a small patisserie surrounded by the craft of flavor and presentation. That experience taught me how much thought and care goes into the things we bring into our lives, whether it’s a box of chocolates or a piece of everyday gear.
In 2025, I turned that perspective toward product reviewing, building this blog to share honest insights, real-world experiences, and practical advice. I live in a quiet neighborhood where my days are split between testing out gadgets, writing from my home office, and enjoying local markets. This site is my way of helping readers cut through the noise and find products that truly add value to their daily routines.
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