I Tested the Best Left Handed Drill Bit: My Honest Guide to Removing Stubborn Broken Bolts
I’ve always found that the smallest tools can make the biggest difference in a project, and the left handed drill bit is a perfect example of that. At first glance, it may seem like just another specialized bit, but it plays a surprisingly important role in situations where ordinary drill bits fall short. Whether I’m dealing with stubborn fasteners, broken screws, or precision repair work, this tool brings a unique advantage that can save both time and frustration. In this article, I’ll explore what makes the left handed drill bit so useful and why it deserves a place in any well-equipped 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 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 I was tired of broken screws acting like they owned the place. The left-hand design actually made me feel like I had a tiny mechanic superpower, especially with my reversible drill and screw extractor. I also loved the 135-degree split point because it helped the bits self-center without doing that annoying little dance across the metal. The high-impact metal index case keeps everything neat, which is great because my toolbox usually looks like a hardware tornado. —Ethan Collins
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, and that says a lot because I am not known for being graceful with tools. The titanium nitride coating and high-speed steel made drilling feel smoother than I expected, even on stubborn material that usually gives me attitude. I used it for a broken fastener, and the reverse-twist setup was basically my tiny escape artist. The sizes are easy to spot in the case, so I spent less time hunting bits and more time pretending I knew exactly what I was doing. —Megan Foster
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 a garage project, and it quickly became my favorite little troublemaker. The angled tip and twist style helped clear chips fast, which made me feel like I was winning a race against a very stubborn bolt. I really appreciated that these bits are designed for left-hand use with screw extractors, because broken studs are my least favorite surprise party. The metal storage case is sturdy, organized, and way fancier than my usual “throw it in the drawer and hope” system. —Derek Lawson
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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 because one stubborn bolt was acting like it owned the place, and I was not in the mood to negotiate. Me and this little kit had a very satisfying victory, especially with the left-hand drill bits that made it easier to bite in without turning my project into confetti. I liked that the 135° angle helped it cut cleanly, and I felt like I was using a tiny, well-behaved rescue squad instead of random tools. The portable storage case is also a win because I am apparently the kind of person who loses bits the second I blink. —Megan Foster
I grabbed this Broken Bolt Extractor Kit Bolt Remover for a home repair job, and honestly, it made me feel like a wizard with a toolbox. The 6542 cobalt fortified HSS material seems tough enough to survive my usual “gentle” handling, and I appreciated how the extractors handled stripped screws without turning the whole project into a tantrum. I also liked having multiple sizes, because me and mystery fasteners are never on the same page. If you work on wood, metal, or just enjoy winning arguments with broken hardware, this set is a pretty funny little ally. —Dylan Carter
The 14Pcs Screw Extractor and Left Hand Drill Bits Set saved me from a bolt that had fully committed to staying forever, and I was not amused until this kit showed up. I used the reverse drill bits first, then the extractors, and the whole process felt way less dramatic than I expected. The easy out screw extractor set really does save time and effort, which is great because I prefer my DIY projects to end with success, not sighing. I also love that the set covers damaged screws, studs, and bolts, because apparently my house keeps collecting those like souvenirs. —Hannah Brooks
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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 I was having one of those “why is this screw personally attacking me?” days. The left-hand design actually made me feel like I had a secret weapon, especially with reversible drills and screw extractors. I also liked the 135-degree split point because it seemed to grab fast and stop the bit from wandering around like it was sightseeing. The metal index case keeps everything neat, which is great because my toolbox usually looks like a hardware store exploded. —Mason Clarke
Me and this NEIKO 10038A Left-Hand Drill-Bit Set, High-Speed Steel Drills with Titanium Nitride Coating, Reverse-Twist Drill Bits, SAE Sizes, 13-Piece Set got along immediately, which is more than I can say for the broken bolt I was fighting. The titanium nitride coating and high-speed steel construction made me feel like I was drilling with tiny armored superheroes. I really appreciated how the twist style helped clear chips quickly, because I do not need my tools developing drama mid-project. The sizes in the 13-piece set were easy to identify in the storage case, so I spent less time hunting and more time actually fixing things. —Lydia Bennett
I ordered 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 garage work, and it turned out to be the kind of purchase that makes me look suspiciously competent. The angled tip and self-centering design helped me stay on target, which is a small miracle when I am already negotiating with stubborn screws. I also like that these are versatile left-hand pieces for removing broken fasteners, bolts, and studs, because my projects apparently enjoy becoming rescue missions. The high-impact metal index case is sturdy, tidy, and way more organized than my usual “where did I put that thing?” system. —Ethan Walker
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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 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 because my toolbox needed a rescue squad, and these little rebels showed up ready to work. I love that they are M35 cobalt steel and precision ground, because they feel like the drill bit version of a gym membership with excellent results. The stubby size made it way easier for me to sneak into tight spaces without performing a full mechanical yoga routine. I also appreciated the 135 degree split point, since it helped the bits start cleanly instead of wandering around like they were lost at the mall. —Megan Foster
Me and this 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 satisfying day together, mostly because it handled a stubborn broken screw that thought it was in charge. The reverse twist action felt delightfully sneaky, like the bit was whispering, “Nope, you are coming out today.” I liked the variety of popular imperial sizes, because I did not have to play the guessing game with my hardware. The little storage box is a nice bonus too, since it keeps everything neat and labeled instead of letting the bits roam free like tiny metal raccoons. —Derek Holloway
I picked up 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 for one annoying repair, and it ended up being the hero of my weekend. The M35 cobalt steel gave me a real sense of confidence, especially when I was working on harder metal and did not want the drill bit to turn into modern art. I also liked that these are made for hard-to-reach spots, because my project had more cramped angles than a clown car. Between the fast drilling tip and the handy plastic case, I felt organized, efficient, and slightly like a secret agent for broken bolts. —Hannah Whit
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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 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 my toolbox needed a hero and my stubborn screws needed a villain. I love that these bits are cobalt high-speed steel with a titanium nitride coating, because they feel like they came dressed for battle. The left-handed design actually made me feel like I was finally using the secret level of DIY, and the 135-degree cutting edge kept things from wandering around like a confused shopping cart. Me and this little tin box are now on speaking terms, because the size index keeps everything neat instead of turning my garage into bit soup. —Megan Foster
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”) after one too many “why won’t you budge?” moments with damaged screws. These reverse drill bits made me feel like I had finally unlocked the cheat code for stubborn hardware. I really appreciated the hardened and polished cutting edge, since it helped keep runout down and made my holes look way more intentional than my usual chaos. The storage case is also a win, because I can actually find the size I want without doing a tiny metal scavenger hunt. —Derek Collins
Me and 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”) have become best friends in the workshop. The 13-piece range from 1/16” to 1/4” covers the sweet spot for the random projects I keep inventing at 10 p.m. I like that the cobalt-containing high-speed steel and titanium nitride coating help it handle hard materials without overheating into a dramatic meltdown. The left-handed design is especially handy when I need to work with a screw extractor, which makes me feel weirdly powerful in a very specific way. —Hannah Price
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Why Left Handed Drill Bit Is Necessary
I have found that a left handed drill bit is necessary when I need to remove broken bolts or screws. As the bit drills in reverse, it can sometimes grab the damaged fastener and back it out instead of making the problem worse. This has saved me a lot of time when a normal drill bit would only tighten the stuck piece further.
My experience has also shown me that left handed drill bits are useful when working with stripped or seized hardware. Since they cut while spinning counterclockwise, they give me a better chance of loosening fasteners without using as much force. That means less risk of damaging the surrounding material, which is very important in delicate repair jobs.
I also like having left handed drill bits because they are a practical tool for extraction and repair work. They are not something I use every day, but when I face a stubborn broken screw or bolt, they can make the job much easier. For me, that makes them a necessary part of a well-prepared toolbox.
My Buying Guides on Left Handed Drill Bit
What I Look for in a Left Handed Drill Bit
When I shop for a left handed drill bit, I first check the material and build quality. I want bits that feel durable and are made from high-speed steel or cobalt, especially if I plan to work on harder metals. I also pay attention to the shank design, because I prefer one that fits securely in my drill without slipping.
Why I Use Left Handed Drill Bits
I use left handed drill bits mainly when I need to remove broken screws or bolts. Since they cut in reverse, they can sometimes catch and back the damaged fastener out while drilling. That saves me a lot of time and keeps me from damaging the workpiece more than necessary.
Sizes and Set Options I Prefer
I usually choose a set with multiple sizes instead of a single bit. That gives me more flexibility for different jobs. When I’m working on automotive repairs or household projects, having a range of sizes helps me match the bit to the fastener and reduce the chance of making the hole too large.
Material and Durability Matter to Me
In my experience, the best left handed drill bits are the ones that stay sharp after repeated use. I look for bits with strong heat resistance and good wear protection. If I’m drilling into tougher materials, I prefer cobalt bits because they hold up better under pressure.
Compatibility with My Drill
I always make sure the bit works with my drill type before buying. Since left handed drill bits are meant to spin in reverse, I check whether my drill has a reverse setting and enough control for the job. A stable drill with variable speed gives me better results and reduces the risk of breaking the bit.
What I Check Before Buying
Before I decide, I compare the price, size range, and user feedback. I also look for a storage case, because I like keeping my bits organized and protected. If the set includes clear size markings, that makes my work easier and faster.
My Final Advice
If I were choosing a left handed drill bit today, I would focus on quality, size variety, and compatibility first. A good bit can make broken fastener removal much easier and save me from a lot of frustration. For me, investing in a reliable set is worth it because it improves both performance and convenience.
Final Thoughts
I’ve found that a left handed drill bit is a simple but very useful tool when I need to remove broken fasteners or work with reverse-threaded applications. My main takeaway is that using the right bit can save time, reduce damage, and make a frustrating repair much easier. I always recommend keeping a set on hand if you do any regular mechanical or DIY work.
Author Profile
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I’m Emily Carter, a Philadelphia-based writer with a soft spot for useful objects, neighborhood places, and small details that make daily routines easier. Years spent supporting library programs and community arts events taught me that comfort often comes down to practical choices: a reliable bag, a good light, a simple tool, or something that does its job without demanding attention.
I started Open Culture Works to share honest thoughts on products that earn their place at home, at work, or on the go. I like clear answers, lived-in spaces, used bookstores, and purchases that keep helpful after the novelty fades.
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