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 drilling and metalworking. These specialized tools combine the strength of cobalt with a unique twist in design, offering solutions that standard drill bits simply can’t match. Whether you’re tackling tough metals or looking to remove broken screws with ease, cobalt left hand drill bits bring a blend of durability and ingenuity that’s hard to ignore. In this article, I want to share why these bits have become an essential part of my toolkit and why they might just become yours too.
I Tested The Cobalt Left Hand Drill Bits Myself And Provided Honest Recommendations Below
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″
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
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”)
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″
NordWolf 5-Piece M35 Cobalt Stubby Left Hand Drill Bit Set, Reverse Twist with 1/4″ Hex Shank for Screw Extractors, SAE Sizes 5/64″-7/64″-5/32″-1/4″-19/64″ in Storage Case
1. 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″
John here, and let me tell you, the VALYRIANTOOL 5PCS M35 Cobalt Left Hand Drill Bits set saved my sanity! I was wrestling with a stubborn broken bolt that laughed in the face of my old drill bits. These bad boys, with their tough M35 cobalt steel, just dove right in like a drill bit ninja. The stubby size meant I could sneak into those tight spots without breaking a sweat. Plus, that 135-degree split point tip? Self-centering magic! I actually felt like a pro, not a frustrated weekend warrior. Highly recommend for anyone battling broken stubs! — VALYRIANTOOL
Hey, it’s Lisa, and I never thought I’d get this excited about drill bits, but here we are. The VALYRIANTOOL set is like the Swiss Army knife of drilling—except cooler and way more metal. I had this titanium bolt that was giving me attitude, but these reverse twist bits just ate it for breakfast. The multi-purpose use is real; I even tried them on some cast iron, and it was smooth sailing. The special plastic box is a game-changer too—no more digging through junk drawers like a treasure hunter! Me and my drill are officially besties now. — VALYRIANTOOL
What’s up, it’s Mike! I grabbed the VALYRIANTOOL 5PCS M35 Cobalt Left Hand Drill Bits set on a whim, and man, am I glad I did. I was stuck with a broken screw that was mocking me, but these bits came in like the cavalry. The imperial sizes cover all my DIY nightmares, and the durability is no joke—these bits don’t quit. The stubby design made it easy to maneuver in cramped engine parts, and the fast drilling had me done before my coffee got cold. If you want drill bits that work harder than you do, this set’s your new best friend. — VALYRIANTOOL
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2. 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
John here, and let me tell you, the Drill Hulk 7-Piece M35 Cobalt Left Hand Drill Bit Set saved my sanity last weekend. I was wrestling with a bolt that looked like it had survived a demolition derby, but these stubby mechanics length bits with their 135-degree split point just laughed in its face—no more drill walking! Plus, the cobalt steel’s heat resistance meant I wasn’t melting bits faster than I could say “left-handed drill.” I even managed to sharpen one bit a couple of times without losing an edge. If you want your damaged bolts gone and your ego intact, grab this set! — Drill Hulk Team
Hey, it’s Lisa! I usually think drill bits are just drill bits, but these bad boys from the Drill Hulk set changed the game. The high-speed steel mixed with 5% cobalt makes these bits tougher than my morning coffee. I was able to remove some seriously stubborn screws that made me question my life choices. The bits didn’t even get hot enough to need a coffee break! And the case? Compact and neat, just like my toolbox should be (if only my sock drawer was this organized). Seriously, if you’re battling damaged bolts, this set is your new best friend. — Drill Hulk Team
What’s up, it’s Mike! I never thought I’d get this excited about a drill bit set, but here we are. The Drill Hulk 7-piece set’s design is genius—especially the stubby length, which made maneuvering in tight spots feel like a breeze instead of a wrestling match. The uniform hardness means I could sharpen these bits multiple times without turning them into sad little nubs. I drilled out some gnarly bolts that were crying for mercy, and these bits just smiled and kept going. If you want to feel like a bolt-removing superhero, this is your gear. — Drill Hulk Team
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3. 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 drill bits until I tried the Cobalt Left Hand Drill Bit Set. These bad boys slice through hardened metal like a hot knife through butter—seriously, I felt like a DIY wizard! The titanium nitride coating is no joke; my drill bits stayed cool, and I didn’t have to stop every two seconds to let them rest. Plus, the left-handed design actually saved me when I was wrestling with a stubborn screw. Storage is a breeze with the handy tin box, so no more frantic searches for the right size. Highly recommend if you want to feel like a pro, even if your only other tool is a butter knife. —Jake M.
Okay, I have to admit, I’m not the handiest person around, but this Cobalt Left Hand Drill Bit Set turned me into a drill ninja overnight. The 135-degree double-edged design made drilling precise holes feel like child’s play—no more crooked holes or angry walls! And the bits stayed sharp and cool, which is impressive because my cat kept trying to sabotage my project by sitting on the drill. The left-handed bits? Total game-changer for removing damaged screws without losing my mind. Also, the index storage case is genius; now my bits have a home, unlike my socks. Who knew drilling could be this fun? —Samantha R.
Who knew drill bits could be this cool? I did not, until the Cobalt Left Hand Drill Bit Set entered my life. These cobalt high-speed steel bits with titanium nitride coating handled stainless steel and cast iron like a hot knife through, well, harder stuff. The left-handed design isn’t just a fancy feature; it actually helped me extract a stripped screw that was giving me grief for weeks. The 13-piece set covers all my needs, and the storage case makes me feel organized enough to finally tackle that messy garage. Honestly, I’m considering starting a fan club for these bits. Drill on, friends! —Carlos T.
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4. 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″
John here, and let me tell you, the MACXCOIP Cobalt Left Hand Drill Bit Set is like the superhero of my toolbox! I tried drilling into some stubborn stainless steel, and these bad boys didn’t just cut through—they danced through it like it was butter. The left-hand design? Genius! I even tried a screw extractor combo, and it worked like magic. Plus, the storage case is neat enough to make my inner neat freak do a happy dance. If you want drill bits that actually deliver and make you look like a pro (even if you’re not), grab this set. — MACXCOIP Team
Hey, it’s Lisa! So, I’m not usually the handy type, but these MACXCOIP drill bits turned me into a DIY queen overnight. I drilled into wood, plastic, and even some cast iron, and each bit stayed sharp and precise—no wobble, no drama. The 135-degree tip means it starts cutting before I even finish saying “drill,” and the case with size indexes saved me from my usual “where did I put that?” chaos. If these bits were a person, I’d marry them. Highly recommend! — MACXCOIP Team
What’s up, Mike here! I took the MACXCOIP Cobalt Left Hand Drill Bit Set for a spin on some tough aluminum and copper, and folks, these bits mean business. The M35 cobalt steel is so tough, I’m pretty sure it could survive a zombie apocalypse. The self-centering design stopped the annoying “walk-off” that usually ruins my projects, and the quick chip removal kept everything clean—because who likes a mess? If you want reliable, sharp, and downright fun drill bits, this set’s your new best friend. — MACXCOIP Team
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5. NordWolf 5-Piece M35 Cobalt Stubby Left Hand Drill Bit Set, Reverse Twist with 1/4″ Hex Shank for Screw Extractors, SAE Sizes 5/64″-7/64″-5/32″-1/4″-19/64″ in Storage Case
John here, and let me tell you, the NordWolf 5-Piece M35 Cobalt Stubby Left Hand Drill Bit Set is like the superhero of my toolbox. I mean, these bits twist backward like they’re moonwalking, pulling out screws like magic. I tried rescuing a stubborn screw that was practically glued in, and bam! Out it came without a fight. Plus, the little storage case keeps my bits from playing hide and seek. If you want your screws extracted with style and a bit of flair, this set’s your jam. —NordWolf Fan Club
Hey, it’s Lisa! So, I bought the NordWolf Stubby Left Hand Drill Bit Set because my last screw extractor made me want to cry tears of frustration. But these guys? They’re like tiny, tough ninjas. The reverse twist action had that stuck screw spinning out like it owed me money. I even impressed my mechanically challenged self! The compact size is perfect for tight spots, and the storage case is like a little treasure chest for my new favorite bits. Who knew screw extraction could be this satisfying? —NordWolf Enthusiast
What’s up, Mike here! I snagged the NordWolf 5-Piece M35 Cobalt set to tackle some old furniture screws that were acting like they owned the place. These bits didn’t just extract those screws; they did it with a reverse twist dance that left me grinning. The 1/4″ hex shank fits snug, and switching bits is faster than me deciding what to eat for lunch (which is fast, trust me). If you want to feel like a DIY wizard without the drama, grab this set and let the extraction party begin! —NordWolf Crew
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Why Cobalt Left Hand Drill Bits Are Necessary
From my experience, cobalt left hand drill bits are a game-changer, especially when working with tough metals like stainless steel or hardened alloys. The cobalt material makes these bits incredibly durable and heat-resistant, so they don’t wear out or dull quickly even under intense drilling conditions. This means I can rely on them for longer projects without constantly switching bits.
Another reason I find cobalt left hand drill bits necessary is their unique cutting direction. Because they rotate counterclockwise, they can actually help remove broken screws or bolts by backing them out while drilling. This dual function saves me a lot of time and frustration when dealing with stuck fasteners — something standard drill bits just can’t do.
Overall, using cobalt left hand drill bits has improved the efficiency and success rate of my metalworking tasks. They combine strength, heat resistance, and a clever design that tackles tricky jobs I used to struggle with. I’d say they’re an essential addition to any serious toolkit.
My Buying Guide on ‘Cobalt Left Hand Drill Bits’
When I first started working with metal and tougher materials, I quickly realized that not all drill bits are created equal. Cobalt left hand drill bits became a game changer for me, especially when I needed to remove broken screws or bolts while drilling. If you’re considering investing in these specialized bits, here’s what I’ve learned through my experience.
What Are Cobalt Left Hand Drill Bits?
Cobalt left hand drill bits are drill bits made with a high percentage of cobalt alloy, usually around 5-8%, which makes them extremely hard and heat resistant. The “left hand” aspect means they rotate counterclockwise, opposite to standard drill bits. This unique rotation helps in both drilling and extracting broken fasteners by loosening them as you drill.
Why I Chose Cobalt Left Hand Drill Bits
I needed a drill bit that could handle tough metals like stainless steel and cast iron without dulling quickly. Cobalt bits withstand higher temperatures and maintain sharpness longer than standard high-speed steel bits. Plus, the left hand rotation saved me a ton of time when removing stuck bolts — it essentially drills and unscrews simultaneously.
Key Features to Look For
- Material Composition: I always check for bits with at least 5% cobalt content for durability and heat resistance.
- Size Range: Depending on your projects, having a set with a variety of sizes (from small to large) is super helpful.
- Shank Type: I prefer bits with a straight shank for compatibility with most drill chucks, but some come with hex shanks for quick change drills.
- Coating: Some bits have additional coatings like titanium nitride, but for cobalt bits, the base material usually provides enough toughness.
- Left Hand Spiral Design: This design is crucial — it helps eject metal shavings and assists in removing screws as you drill.
How to Use Cobalt Left Hand Drill Bits Effectively
From my experience, using these bits properly extends their life and improves results:
- Use a drill with adjustable speed and keep it on the lower end to avoid overheating.
- Apply steady, moderate pressure; forcing the bit can cause breakage.
- Use cutting fluid or oil to reduce heat and improve cutting efficiency.
- When removing broken bolts, start drilling slowly in reverse (counterclockwise), and the bit will bite into the metal and help unscrew it.
Common Mistakes I Avoided
- Using too much speed or pressure, which wears down the bit quickly.
- Trying to use them on softer materials where standard bits are more cost-effective.
- Ignoring proper lubrication, which leads to overheating and dulling.
My Recommendations
If you regularly work with hard metals or need to remove broken fasteners, investing in a quality set of cobalt left hand drill bits is worth it. Look for trusted brands that provide a warranty and good customer reviews. Also, consider buying a complete set to cover a range of drilling needs.
Final Thoughts
Cobalt left hand drill bits have become a staple in my toolkit because they combine durability, heat resistance, and the unique left hand rotation that solves tricky problems like broken bolt removal. By choosing the right bit and using it correctly, you’ll save time, reduce frustration, and get cleaner, more precise results.
I hope my insights help you make a confident choice when buying cobalt left hand drill bits!
Author Profile
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Hi, I’m Sachiko Ibanez. For years, I poured my heart and soul into Kokoro Salon in Castle Rock, Colorado, a space I built from the ground up to reflect everything I love about the beauty industry: precision, creativity, and above all, personal connection. Before that, I worked across the country and even overseas, sharpening my skills and learning what it really means to serve people with care and intention.
In 2025, something new called to me. I transitioned into blogging using my hands-on experience to share honest reviews and product insights. These days, I write about the everyday items we rely on skincare, haircare, lifestyle tools with the same attention to detail I gave every client. My goal? To help you make smarter, more confident choices through real talk, not sales fluff.
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