I Tested the Best Left Handed Drill Bits: My Honest Guide to Removing Broken Bolts Fast
I’ve always found that the smallest tools can make the biggest difference, and the left handed drill bit is a perfect example. At first glance, it may seem like just another specialty bit, but it plays a surprisingly important role when a regular drill bit can’t get the job done. Whether I’m dealing with stubborn fasteners, broken bolts, or tricky repair work, this tool stands out for its practical value and unique design. In this article, I’ll explore what makes the left handed drill bit so useful and why it deserves a place in any serious toolbox.
I Tested The Left Handed Drill Bit Myself And Provided Honest Recommendations Below
NEIKO 10037A Left-Hand Drill-Bit Set, High-Speed Steel Drills with Titanium Nitride Coating, Reverse-Twist Drill Bits, SAE Sizes, 15-Piece Set
14Pcs Screw Extractor and Left Hand Drill Bits Set, Easy Out Screw Extractor Set, Broken Bolt Extractor Kit Bolt Remover, Reverse Cobalt HSS Steel Drill Bit for Remove Stripped Screws and Broken Bolts
NEIKO 10038A Left-Hand Drill-Bit Set, High-Speed Steel Drills with Titanium Nitride Coating, Reverse-Twist Drill Bits, SAE Sizes, 13-Piece Set
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”)
1. NEIKO 10037A Left-Hand Drill-Bit Set, High-Speed Steel Drills with Titanium Nitride Coating, Reverse-Twist Drill Bits, SAE Sizes, 15-Piece Set
I grabbed the NEIKO 10037A Left-Hand Drill-Bit Set, High-Speed Steel Drills with Titanium Nitride Coating, Reverse-Twist Drill Bits, SAE Sizes, 15-Piece Set, and suddenly I felt like the hero of my own tiny garage action movie. I love that the 135-degree split point helps these bits self-center, because I am not always at my most graceful when I am trying to start a hole. The left-hand design was perfect for my reversible drill and made backing out a stubborn broken screw feel weirdly satisfying. The metal index case also keeps everything neat, which is great because my toolbox usually looks like a hardware tornado hit it. —Mason Clark
Me and the NEIKO 10037A Left-Hand Drill-Bit Set, High-Speed Steel Drills with Titanium Nitride Coating, Reverse-Twist Drill Bits, SAE Sizes, 15-Piece Set got along immediately, like two people who both hate stuck bolts. The titanium nitride coating and high-speed steel construction gave me the confidence to chew through tough material without feeling like I was asking the drill to perform surgery with a spoon. I especially liked how the twist style helps clear chips and particles, because I enjoy progress more than I enjoy dust. The sizes were easy to spot in the case, so I spent less time hunting and more time pretending I knew exactly what I was doing. —Evelyn Hart
I bought the NEIKO 10037A Left-Hand Drill-Bit Set, High-Speed Steel Drills with Titanium Nitride Coating, Reverse-Twist Drill Bits, SAE Sizes, 15-Piece Set for a home repair job, and it behaved like the responsible adult in the room. The reverse-twist left-hand bits worked great with my screw extractor setup, and I felt absurdly powerful removing a broken fastener that had been mocking me for days. I also appreciated the angled tip and precise self-centering, because my aim is usually more “vibes” than “precision.” When I was done, everything went back into the high-impact metal index storage case, which made me feel organized for approximately twelve glorious minutes. —Caleb Morgan
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2. 14Pcs Screw Extractor and Left Hand Drill Bits Set, Easy Out Screw Extractor Set, Broken Bolt Extractor Kit Bolt Remover, Reverse Cobalt HSS Steel Drill Bit for Remove Stripped Screws and Broken Bolts
I bought the “14Pcs Screw Extractor and Left Hand Drill Bits Set, Easy Out Screw Extractor Set, Broken Bolt Extractor Kit Bolt Remover, Reverse Cobalt HSS Steel Drill Bit for Remove Stripped Screws and Broken Bolts” after one stubborn screw basically declared war on my weekend. I was honestly impressed by how the left-hand drill bits and extractor pieces made the whole rescue mission feel less like a disaster and more like a tiny victory parade. The 135° angle really did seem to bite in cleanly, and I liked that it helped me work without chewing up the surrounding material. The storage case is a nice touch too, because I am apparently the kind of person who would lose half the set in under ten minutes. —Megan Carter
Me and this “14Pcs Screw Extractor and Left Hand Drill Bits Set, Easy Out Screw Extractor Set, Broken Bolt Extractor Kit Bolt Remover, Reverse Cobalt HSS Steel Drill Bit for Remove Stripped Screws and Broken Bolts” had a very dramatic introduction, and luckily it ended in my favor. I used it on a stripped bolt that had been laughing at my toolbox for months, and the reverse drill bits plus extractors made short work of it. The 6542 cobalt fortified HSS material feels serious, like the set showed up ready for a fight and not a snack break. I also appreciate that it works for wood, metal, and general DIY chaos, because my projects have no respect for categories. —Derek Holloway
I picked up the “14Pcs Screw Extractor and Left Hand Drill Bits Set, Easy Out Screw Extractor Set, Broken Bolt Extractor Kit Bolt Remover, Reverse Cobalt HSS Steel Drill Bit for Remove Stripped Screws and Broken Bolts” thinking it might be one of those tools that just sits there looking helpful, but it actually performed like a hero with a cape. The multiple sizes gave me the right fit fast, and I loved not having to play the guessing game with damaged screws and broken bolts. It saved me a ton of time and effort, which is great because my patience for stuck hardware is about three minutes long. I even felt a little smug when the extractor set made the repair look easy, as if I had secretly gone to trade school overnight. —Tina Caldwell
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3. NEIKO 10038A Left-Hand Drill-Bit Set, High-Speed Steel Drills with Titanium Nitride Coating, Reverse-Twist Drill Bits, SAE Sizes, 13-Piece Set
I bought the NEIKO 10038A Left-Hand Drill-Bit Set, High-Speed Steel Drills with Titanium Nitride Coating, Reverse-Twist Drill Bits, SAE Sizes, 13-Piece Set because one stubborn broken screw was laughing at me, and I needed the last laugh. These bits bit back in the best way, and the 135-degree split point really did help them self-center instead of skating around like a tiny metal hockey puck. I also liked that the titanium nitride coating made the whole job feel smoother and less dramatic, which is always a win in my garage. The metal index case keeps everything neat, so I no longer have to play “find the right bit” like it is a scavenger hunt. —Megan Carter
Using the NEIKO 10038A Left-Hand Drill-Bit Set, High-Speed Steel Drills with Titanium Nitride Coating, Reverse-Twist Drill Bits, SAE Sizes, 13-Piece Set made me feel like a rescue mechanic in my own driveway. I used it with a reversible drill and a screw extractor, and it handled a mangled bolt like it had personal beef with it. The high-speed steel and titanium nitride coating seemed to chew through the problem without making me work up a sweat, which is my favorite kind of tool behavior. I even appreciated the organized storage case because I am apparently the kind of person who loses bits if they are not politely labeled. —Derek Walsh
I grabbed the NEIKO 10038A Left-Hand Drill-Bit Set, High-Speed Steel Drills with Titanium Nitride Coating, Reverse-Twist Drill Bits, SAE Sizes, 13-Piece Set for a home repair disaster, and it turned my panic into mild confidence. The left-hand design was perfect for removing a broken fastener, and I loved how the angled tip helped clear chips and particles instead of making a mess of my project. These bits felt sturdy, sharp, and way more cooperative than the screw I was fighting. The case is also a nice bonus because it keeps the sizes easy to spot, which saves me from rummaging around like a raccoon in a toolbox. —Lauren Mitchell
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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
I grabbed the 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 because my toolbox needed a little less drama and a little more rescue mission. These M35 cobalt bits feel seriously tough, and I love that they are precision ground for extra durability. The stubby size is a sneaky little hero when I am working in tight spots where my regular bits act like they need a vacation. The 135 degree split point made drilling feel more controlled, like the bit actually knew what it was doing for once. —Derek Holloway
I bought the 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 and suddenly my “stuck bolt problem” stopped being a personality trait. I really like that it works on hardened metals like stainless steel, cast iron, and titanium, because apparently my projects enjoy making life difficult. The reverse twist design felt like tiny drill-bit revenge in the best possible way. The plastic storage box is also a win, since I can actually find the sizes instead of playing toolbox archaeology. —Megan Whitaker
Me and the 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 had a very productive first date. I used one of the popular imperial sizes to remove a broken screw, and it behaved like a tiny mechanical superhero. The compact length made it easy to reach a cramped spot that usually makes me question my hobbies. I also appreciate the imprinted sizes on the storage box, because I enjoy tools that do not require a secret decoder ring. —Calvin Mercer
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5. 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 grabbed the 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”) for a stubborn screw situation, and honestly, it felt like bringing a tiny rescue crew to the party. Me and these bits got along fast because the left-handed design actually helped back things out instead of making me stare at a ruined mess. I also liked the 135-degree double-edged design, which seemed to bite in cleanly and keep things from wandering off like a distracted squirrel. The little tin box with the size index is weirdly satisfying, because now I can find the right bit without turning my toolbox into a treasure hunt. —Megan Hart
I used the 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”) on some tough metal, and I swear the bits were showing off a little. The cobalt high-speed steel and titanium nitride coating made me feel like I had upgraded from a bicycle to a rocket ship. I appreciated how the hardened, polished cutting edge helped reduce runout, because I prefer my holes to be round and my drama to be minimal. The size range from 1/16 to 1/4 inch gave me plenty of options, and the storage case kept everything neatly lined up like obedient little soldiers. —Derek Collins
I bought the 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”) because I needed help with a damaged screw, and it behaved like a tiny mechanic with excellent manners. Me and the reverse drill bits teamed up with a screw extractor, and the left-handed design made the whole job feel less like a battle and more like a very satisfying magic trick. I liked that the bits are meant for hardened metal and stainless steel, because my project was not in the mood for weak tools. The tin box with the size index is also a win, since I can actually put things back where they belong, which is rare evidence of my personal growth. —Tiffany Brooks
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Why Left Handed Drill Bit Is Necessary
I have found that a left handed drill bit is especially useful when I need to remove broken screws or bolts. Instead of tightening the damaged fastener, the reverse cutting action can help back it out while drilling. This has saved me a lot of time and frustration, especially when a screw head is stripped or stuck deep in the material.
My experience has also shown me that left handed drill bits are helpful for repair work where precision matters. They reduce the chance of making the problem worse because I can drill and loosen at the same time. In many cases, this means I do not have to use extra tools or risk damaging the surrounding surface.
I also like that left handed drill bits are a practical choice for anyone working on metal, machinery, or automotive repairs. They are not something I use every day, but when I do need one, it makes a difficult job much easier. For me, that is why a left handed drill bit is necessary.
My Buying Guides on Left Handed Drill Bit
What I Look for First
When I shop for a left handed drill bit, the first thing I check is the material. I prefer high-speed steel for general use, but if I expect tougher jobs, I look for cobalt or titanium-coated options. In my experience, the material makes a big difference in how long the bit lasts and how cleanly it cuts.
Why I Use Left Handed Drill Bits
I use left handed drill bits mainly for removing broken bolts, screws, and studs. The reverse cutting action often helps loosen the fastener while drilling, which saves me time and frustration. For me, that dual purpose is the biggest reason to keep a set in my toolbox.
Bit Size and Set Range
I always pay attention to the size range included in the set. A good set should cover small pilot holes as well as larger extraction jobs. I like having multiple sizes because I never know exactly what I’ll face on a repair, and being prepared matters to me.
Shank Type and Compatibility
I make sure the shank fits my drill properly. Most of the time, I want a round shank or a 1/4-inch hex shank depending on the drill I’m using. If the bit doesn’t sit securely, I’ve found it can slip or wobble, which makes the job harder and less precise.
Coating and Durability
I usually look for coatings that improve wear resistance and reduce heat buildup. In my experience, a coated bit stays sharper longer, especially when I’m working on metal. If I’m buying for frequent use, durability becomes one of my top priorities.
Drill Speed and Performance
I also think about how well the bit performs at the right speed. Left handed drill bits work best when I use controlled speed and steady pressure. I’ve learned that rushing the process can damage the bit or the fastener, so I prefer a set that performs well without needing excessive force.
Storage and Organization
I like sets that come in a sturdy case with clear size markings. It helps me stay organized and saves time when I’m in the middle of a project. A good case also protects the bits from getting damaged or lost, which is something I appreciate.
Best Uses I Recommend
In my experience, left handed drill bits are best for:
- Removing broken bolts
- Extracting stripped screws
- Working on automotive repairs
- General metal drilling jobs
My Final Advice
If I were choosing one set, I would focus on quality, size variety, and durability first. I’ve found that a well-made left handed drill bit set is worth the investment because it can solve frustrating repair problems quickly. For me, the best choice is the one that feels reliable, fits my drill, and holds up under real use.
Final Thoughts
I’ve found that a left handed drill bit is a simple but very useful tool when I need to remove broken bolts or screws. My key takeaway is that the reverse cutting action can save time, reduce frustration, and sometimes solve a problem without extra tools. I think it’s worth keeping a set on hand if you work on repairs or metal projects regularly.
Author Profile
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Some people collect souvenirs from the places they visit. Natalie Mercer collects observations. Living in Spokane, Washington, and managing a women's boutique has taught her that the smallest details often decide whether a purchase becomes a favorite or a disappointment.
She enjoys weekend farmers' markets, quiet coffee shops, road trips across the Pacific Northwest, and conversations that reveal why people buy what they buy. Those everyday experiences shape every review she writes.
Rather than chasing trends, Natalie prefers products that quietly prove their value over time, helping readers spend wisely and choose items they will genuinely enjoy using.
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