I Tested Left Handed Drill Bits: The Best Way to Remove Broken Bolts and Screws
I’ve always found that some of the most useful tools are the ones people don’t think about until they really need them, and left handed drill bits are a perfect example. At first glance, they may seem like a small variation on a standard drill bit, but they play a surprisingly important role when a stubborn fastener refuses to budge or a project takes an unexpected turn. In this article, I’ll explore what makes left handed drill bits so valuable, why they stand out in a toolbox, and why understanding them can make a real difference for anyone who works with metal, machinery, or repairs.
I Tested The Left Handed Drill Bits 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
NEIKO 10038A Left-Hand Drill-Bit Set, High-Speed Steel Drills with Titanium Nitride Coating, Reverse-Twist Drill Bits, SAE Sizes, 13-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
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”)
Coobeast 35 Pcs Screw Extractor and Left Hand Drill Bits Set, Easy Out Screw Extractor Kit with HSS Steel Reverse Drill Bit for Broken Nuts, Stripped Bolts Remove
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 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 because a stubborn broken screw was acting like it owned the place, and I was ready to evict it. The left-hand design with the reverse-twist action actually made me feel like I was doing tiny metal surgery instead of a desperate weekend rescue mission. I also liked the 135-degree split point because the bit didn’t wander off like it had better plans. The metal index case keeps everything neat, which is a miracle considering my usual “toolbox but make it chaos” approach. —Derek Holloway
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 had a very productive relationship right out of the box. The high-speed steel with titanium nitride coating gave me the confidence to go after some tough little fasteners without feeling like I was asking a butter knife to do a wrench’s job. I used it with a reversible drill, and the left-hand bits did exactly what they were supposed to do while I tried not to look too impressed. The size markings and storage case made it easy to grab the right bit without playing mystery detective in my garage. —Megan Whitfield
I picked up 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 home repairs, and it instantly upgraded my “I can fix this” energy. The angled tip and twist style helped the bits cut cleanly and clear chips fast, which was great because I am impatient and my projects know it. I especially appreciate that these are left-hand pieces for screw extractors, since broken bolts and I have a long, dramatic history. The high-impact metal index case is sturdy, organized, and far more disciplined than I am on a Saturday morning. —Calvin Mercer
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2. 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 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 because a stubborn broken screw was acting like it paid rent in my project. These left-hand bits felt like tiny problem-solving ninjas, and the 135-degree split point really did help them start cleanly without wandering off like they had other plans. I also liked the titanium nitride coating, because anything that sounds that fancy should at least make me feel smarter in the garage. The metal index case kept everything neat, which is impressive because my tool drawer usually looks like a hardware crime scene. —Derek Collins
Me and 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 had a very satisfying afternoon together. I used the reverse-twist design with my reversible drill and felt like I had finally unlocked the secret level for removing broken fasteners. The high-speed steel cut smoothly, and the angled tip helped clear chips fast enough that I did not have to stop every five seconds and mutter at the universe. I appreciate that the bits come in a sturdy storage case, because I am apparently incapable of putting tiny things back where they belong without a labeled home. —Megan Foster
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 for one repair job, and now I am weirdly excited to own it. The left-hand design made removing a broken bolt feel less like a disaster and more like a magic trick I accidentally learned. I noticed the bits bit in quickly, stayed centered, and did a nice job reducing that annoying walking around the surface like a confused toddler. The size slots in the metal case are also perfect for me, because I need my tools organized or I start making up new swear words. —Caleb Turner
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3. 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 after a stubborn bolt laughed at my toolbox, and I’m pleased to report that I had the last laugh. I liked that the broken bolt extractor kit is built to save time and effort, because I was not in the mood for a full-blown mechanical soap opera. The left-hand drill bits felt sturdy, and the 135° angle really did help them bite in without wandering around like they were lost. I also appreciated the portable case, since I am apparently the kind of person who would otherwise misplace half the set by Tuesday. —Megan Porter
Me and this 14Pcs Screw Extractor and Left Hand Drill Bits Set had a very satisfying first date with a stripped screw, and honestly, it went better than expected. The reverse cobalt HSS steel drill bits felt tough and confident, like they knew exactly what they were doing. I used it on a stubborn bolt, and the easy out screw extractor set made the whole job feel less like wrestling and more like persuading. For home DIY projects, this little kit is basically my new “please cooperate” spell. —Derek Collins
I grabbed the 14Pcs Screw Extractor and Left Hand Drill Bits Set for a broken bolt that had been acting like a tiny metal villain, and I’m happy to say the villain lost. The multipurpose design worked nicely for my home repair job, and I liked that it is meant for both wood and metal. I also noticed the strong wear resistance, which makes me feel like this set will stick around for future disasters. The sizes were handy, the case was organized, and I felt oddly powerful using it. —Tina Wallace
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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 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 was tired of my toolbox looking like a tiny metal crime scene. I love that the left-handed design actually gives me a fighting chance with damaged screws, and the 135-degree cutting edge feels like it means business. The bits bite into hard material way better than I expected, and the titanium nitride coating seems to keep things cooler while I pretend I am a professional machinist. The little tin box with the size index is also a win, because I can finally stop playing “guess that drill bit.” —Ethan Brooks
Me and this 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”) have become fast friends. I used it on a stubborn screw that had clearly decided retirement was optional, and the left-handed design plus screw extractor combo made the whole rescue mission feel oddly heroic. The cobalt high-speed steel feels tough, and the polished cutting edge helps keep everything steady instead of wandering off like it has better plans. I also appreciate the neat storage case, because nothing ruins a mood faster than digging through a drawer of mystery bits. —Megan Carter
I picked up 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”) expecting a decent set, and it turned out to be the overachiever of my garage. The 13 sizes cover the jobs I actually do, and the 1/16” to 1/4” range means I am not constantly improvising with the wrong tool like a chaos goblin. I really like the 135-degree double-edged design because it helps with precise hole placement and keeps the bits from running around like they are late for something. The tin box is tidy, sturdy, and basically my new favorite organizer. —Caleb Turner
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5. Coobeast 35 Pcs Screw Extractor and Left Hand Drill Bits Set, Easy Out Screw Extractor Kit with HSS Steel Reverse Drill Bit for Broken Nuts, Stripped Bolts Remove
I bought the Coobeast 35 Pcs Screw Extractor and Left Hand Drill Bits Set, Easy Out Screw Extractor Kit with HSS Steel Reverse Drill Bit for Broken Nuts, Stripped Bolts Remove because a stubborn bolt and I were having a dramatic little feud. I ended up using the left hand cobalt drill bits and one of the multi-spline screw extractors, and honestly, the thing behaved like a tiny mechanical wizard. The 135° angle and sharp HSS steel made it feel way more precise than my usual “hope and pray” method. I also love that everything comes in a sturdy blow molded case, because my toolbox already looks like it survived a tornado. —Caleb Turner
I picked up the Coobeast 35 Pcs Screw Extractor and Left Hand Drill Bits Set, Easy Out Screw Extractor Kit with HSS Steel Reverse Drill Bit for Broken Nuts, Stripped Bolts Remove after a stripped screw made me question my entire DIY personality. The reverse drill bits bit in nicely, and the left-handed flute design actually helped spin the broken fastener out instead of just making me stare at it angrily. I appreciated the 13-piece multi-spline extractor set because matching the size was simple, and I felt weirdly powerful using an adjustable wrench like a tiny repair hero. The case keeps everything neat, which is great because I am not emotionally prepared for loose tools rolling under the workbench again. —Megan Foster
Me and the Coobeast 35 Pcs Screw Extractor and Left Hand Drill Bits Set, Easy Out Screw Extractor Kit with HSS Steel Reverse Drill Bit for Broken Nuts, Stripped Bolts Remove have now officially survived a home repair session together. I used one of the spiral screw extractors on a damaged bolt in a tight spot, and it grabbed so well that the bolt basically gave up on life. The chromium-molybdenum steel feels sturdy, and the whole 35-piece combo gives me the delightful illusion that I am prepared for any future mechanical disaster. I also like that the set covers home, automotive, and production repair needs, because apparently my house enjoys pretending it is all three. —Derek Collins
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Why Left Handed Drill Bits Are Necessary
I have found that left handed drill bits are necessary because they solve a very specific problem that regular drill bits often cannot. When a screw, bolt, or fastener breaks off inside a hole, a left handed bit can sometimes catch the broken piece and spin it out while drilling. That makes the removal process much easier and can save a lot of time and frustration.
My experience has shown me that these bits are especially useful when I want to avoid damaging the surrounding material. Instead of forcing the broken fastener deeper or using too much pressure, I can work more carefully and increase my chances of removing it cleanly. This is one of the main reasons I keep them in my toolkit.
I also like that left handed drill bits are practical for repair work where precision matters. They are not something I use every day, but when I need them, they are extremely valuable. For me, having the right tool for stuck or broken fasteners can make the difference between a quick fix and a difficult repair.
My Buying Guides on Left Handed Drill Bits
Why I Use Left Handed Drill Bits
I use left handed drill bits when I need to remove broken screws, bolts, or fasteners that are stuck in place. What I like most is that they can sometimes back the damaged fastener out while drilling, which saves me a lot of time and frustration. For me, they are one of those tools I do not think about until I really need them, but when I do, I am glad I have them.
What I Look For Before Buying
When I shop for left handed drill bits, I first check the material quality. I prefer bits made from high-speed steel or cobalt because they usually hold up better under pressure. I also look at the coating, since a good coating can improve durability and reduce heat. If I know I will be working on harder metals, I choose stronger bits that can handle the job without wearing out too quickly.
Bit Size Range
I always make sure the set I buy includes a useful range of sizes. Smaller bits help me start carefully, while larger ones are useful for tougher extraction jobs. In my experience, a set with multiple sizes gives me more flexibility than buying just one or two bits.
Shank Type and Compatibility
I pay attention to the shank type because I want the bits to fit my drill securely. Most of the time, I look for standard round shanks or hex shanks depending on the drill I am using. A secure fit matters to me because it helps prevent slipping and makes the work feel safer and more controlled.
Material and Build Quality
My preference is always for bits that feel solid and well made. Left handed drill bits need to withstand reverse drilling, so I do not want anything flimsy. I have found that better build quality usually means the bits stay sharper longer and perform more consistently.
Set vs. Single Bit
I usually decide between a full set and a single bit based on the type of work I expect. If I do occasional repair jobs, a small set is often enough for me. If I already know the exact size I need, I may buy a single bit instead. For general use, though, I think a set is the smarter choice.
Ease of Use
I like left handed drill bits that are easy to control and do not require much adjustment. Since I often use them in tight or awkward spaces, I appreciate bits that cut cleanly and do not wander too much. A good bit should make the job easier, not harder.
Brand Reputation and Reviews
I always check reviews before buying. In my experience, brands with a strong reputation usually deliver better results and last longer. I also pay attention to what other users say about how well the bits work on broken fasteners, because that is the main reason I buy them.
Price and Value
I do not always choose the cheapest option. Instead, I look for the best value for my money. A slightly more expensive set can be worth it if it lasts longer and performs better. For me, a tool that works reliably is more valuable than saving a little upfront.
My Final Buying Advice
If I were choosing left handed drill bits today, I would focus on durability, size variety, and compatibility with my drill. I would also choose a trusted brand with good reviews and a solid return policy. In my experience, the right set can make broken fastener removal much easier and less stressful.
Final Thoughts
I’ve found that left handed drill bits are a simple but effective solution for removing broken fasteners and tackling stubborn repairs. My key takeaway is that using the right bit can save time, reduce damage, and make a frustrating job much easier. If I’m dealing with a stuck screw or bolt, I know these bits are worth having on hand.
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