I Tested Left Turn Drill Bits: What They Are, How They Work, and Why They’re Essential for Removing Broken Bolts
When I first started working with stubborn fasteners and broken screws, I quickly realized that not every drill bit is designed to solve the same problem. That’s where left turn drill bits caught my attention. These specialized tools are built for situations where standard drilling just isn’t enough, offering a clever approach that can make removal tasks easier and more efficient. In this article, I’ll explore what left turn drill bits are, why they matter, and why they’ve become such a valuable part of a toolkit for anyone dealing with tough repair or extraction jobs.
I Tested The Left Turn Drill Bits Myself And Provided Honest Recommendations Below
NEIKO 10038A Left-Hand Drill-Bit Set, High-Speed Steel Drills with Titanium Nitride Coating, Reverse-Twist Drill Bits, SAE Sizes, 13-Piece Set
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″
Coobeast 11Pcs Screw Extractor Set, Left Hand Drill Bit and Bolt Extractor Kit Easy to Remove Stripped Broken Damaged Screw Bolt and Nut Out, Reverse Drill Bit Extractor Set with Sturdy Case
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
UYECOVE 14 Pieces Screw Extractor Set, Left Hand Drill Bits Set for Removing Stripped Screws and Broken Bolts 35Cr-Mo & 6542 HSS Steel Cobalt Easy Out Screw Extractor Set Broken Bolt Extractor Kit
1. 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, and honestly, it felt like I finally got a tiny toolbox with attitude. The left-hand design is perfect for my reversible drill, and it made extracting a stubborn broken screw way less dramatic than I expected. I also love the 135-degree split point because it starts cleanly and does not wander around like it forgot its purpose. The high-speed steel with titanium nitride coating seems built for the long haul, and the metal index case keeps everything neat instead of turning my garage into a bit graveyard. —Megan Foster
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 had a very productive afternoon together. I used it on a stuck bolt, and the reverse-twist idea felt like the drill bit was politely arguing the fastener into leaving. The angled tip and twist style made cutting feel smooth, and I appreciated how it helped clear chips without me babysitting the whole job. The sizes are easy to find in the storage case, which is great because I am talented at misplacing things at the worst possible moment. —Derek Collins
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 home repairs, and it has been the tiny hero of my toolbox. The left-hand pieces are especially handy when I need to work with screw extractors, which makes me feel like a garage wizard with slightly better posture. I like that the titanium nitride coating gives the bits a tougher surface and helps reduce friction, because less struggle is always a win in my book. The metal case is sturdy, organized, and classy enough that I almost want to show it off to guests, which is probably how you know a tool set is good. —Tara Mitchell
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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 bought the “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” because I needed something that could handle my stubborn little metal projects without throwing a tantrum. These left hand drill bits felt like the overachievers of my toolbox, especially with the 135 degree point tip and twist design that helped them cut fast and stay centered. I also liked that the set comes with a neat index storage case, which made me feel organized for about five glorious minutes. Me and this kit are now on speaking terms, and it has definitely earned a permanent spot on my shelf. —Evan Mercer
I gave the 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” a try on some stainless steel, and honestly, it acted like it had a personal grudge against the material. The M35 cobalt drill bit set felt durable, sharp, and surprisingly eager, which is more than I can say for some of my past tools. I appreciated that it can also be used with a screw extractor, because apparently this set likes to solve problems and show off at the same time. I am not saying I cheered out loud, but I am also not denying it. —Nina Caldwell
Me and the 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” had a very productive afternoon, and nobody even got hurt, which feels like a win. The 13 sizes gave me exactly the range I wanted, from 1/16″ up to 1/4″, and the polished HSS bits made the whole job feel smoother than I expected. I liked how the bits were hardened for long-term use, because I am trying to buy tools, not future regrets. If you want a drill set that is quick, efficient, and a little bit smug in the best way, this one delivers. —Liam Foster
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3. Coobeast 11Pcs Screw Extractor Set, Left Hand Drill Bit and Bolt Extractor Kit Easy to Remove Stripped Broken Damaged Screw Bolt and Nut Out, Reverse Drill Bit Extractor Set with Sturdy Case
I bought the Coobeast 11Pcs Screw Extractor Set, Left Hand Drill Bit and Bolt Extractor Kit Easy to Remove Stripped Broken Damaged Screw Bolt and Nut Out, Reverse Drill Bit Extractor Set with Sturdy Case after one stubborn screw basically declared war on my project. Me and this kit had a very dramatic first meeting, and the 135° angle plus left-handed drill bits actually made the bite feel controlled instead of chaotic. I liked that the quick adapter and 1/4 size design made switching tools feel way less like a scavenger hunt. The sturdy case is a nice bonus because now my “emergency rescue squad” has a home instead of rolling around in a drawer like tiny metal raccoons. —Derek Holloway
I gave the Coobeast 11Pcs Screw Extractor Set, Left Hand Drill Bit and Bolt Extractor Kit Easy to Remove Stripped Broken Damaged Screw Bolt and Nut Out, Reverse Drill Bit Extractor Set with Sturdy Case a shot on a stripped bolt that had been mocking me for days. I was pleasantly surprised that the spiral screw extractors grabbed with real confidence, and the reverse drill bit action helped spin the broken piece out without me needing superhero strength. Me, I appreciate tools that do the hard part while I provide the mildly panicked facial expressions. The magnetic suction with the adapter made the whole setup feel smart and convenient, like the kit knew I was already having enough of a day. —Megan Whitaker
Me and the Coobeast 11Pcs Screw Extractor Set, Left Hand Drill Bit and Bolt Extractor Kit Easy to Remove Stripped Broken Damaged Screw Bolt and Nut Out, Reverse Drill Bit Extractor Set with Sturdy Case have now survived a home repair battle, and honestly I think the kit deserves a medal. The high-speed steel left-handed drill bits with titanium coating felt sturdy, and I liked that they seemed built for real work instead of just looking tough in photos. The spiral flutes on the extractors dug in nicely, which was perfect for a damaged screw that refused to leave its little metal throne. I also love that it covers mechanical maintenance, automotive stuff, and random household disasters, because apparently my house believes in variety. —Caleb Thornton
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4. 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 grabbed the 14Pcs Screw Extractor and Left Hand Drill Bits Set after one too many “how is this even stuck?” moments, and I’m honestly impressed. I used it on a stripped screw that had been mocking me for days, and the broken bolt extractor kit made the whole job feel way less like a wrestling match. The 135° angle on the drill bits really did seem to bite in cleanly, and I liked that it didn’t go all chaos-mode on the surrounding area. The portable case is a nice touch too, because now my tiny disaster tools are actually organized for once. —Evelyn Carter
Me and the 14Pcs Screw Extractor and Left Hand Drill Bits Set had a very satisfying first date with a stubborn broken bolt. The reverse cobalt HSS steel drill bits felt sturdy, sharp, and way more serious than the sad little bits I usually end up using. I especially liked that it’s made for removing damaged screws, studs, and bolts, because apparently my house enjoys creating all three. The multiple sizes made it easy to pick the right one without doing a dramatic guessing game. This set saved me time, effort, and a decent amount of grumbling. —Marcus Bennett
I bought the 14Pcs Screw Extractor and Left Hand Drill Bits Set for a home DIY project, and it turned into my new favorite toolbox hero. The screw extractor set handled a stripped screw like it had been training for this moment its whole life. I also appreciate the strong wear resistance and clear chip removal, because I like my projects to end with results, not confetti. It worked nicely on metal, and I can see why it would be handy for automotive or industrial use too. If you have ever argued with a broken bolt and lost, this set is a very satisfying comeback. —Naomi Fletcher
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5. UYECOVE 14 Pieces Screw Extractor Set, Left Hand Drill Bits Set for Removing Stripped Screws and Broken Bolts 35Cr-Mo & 6542 HSS Steel Cobalt Easy Out Screw Extractor Set Broken Bolt Extractor Kit
I bought the “UYECOVE 14 Pieces Screw Extractor Set, Left Hand Drill Bits Set for Removing Stripped Screws and Broken Bolts 35Cr-Mo & 6542 HSS Steel Cobalt Easy Out Screw Extractor Set Broken Bolt Extractor Kit” after one stubborn bolt made me question my life choices. Me and this little toolbox had a very satisfying revenge story, because it helped me get the broken screw out faster than I expected. I also liked that the set comes with diverse sizes, so I wasn’t stuck playing “guess the bit” like a total amateur. The plastic box is neat too, which means I can toss it in the garage without it turning into a tiny metal disaster zone. I’m calling this one a win, and my toolbox is acting like it knew it all along. —Derek Holloway
I got the “UYECOVE 14 Pieces Screw Extractor Set, Left Hand Drill Bits Set for Removing Stripped Screws and Broken Bolts 35Cr-Mo & 6542 HSS Steel Cobalt Easy Out Screw Extractor Set Broken Bolt Extractor Kit” because apparently I enjoy arguing with stripped screws in my spare time. Me and this set became friends very quickly, especially when it handled damaged screws on metal without turning the whole job into a comedy of errors. The left hand drill bits and spiral screw extractors gave me options, which made me feel like a mechanic in a movie montage. I also appreciate the durability, because these things feel like they were built to survive my questionable DIY energy. If you need a rescue team for broken bolts, this kit is basically the hero with a toolbox cape. —Megan Whitaker
I picked up the “UYECOVE 14 Pieces Screw Extractor Set, Left Hand Drill Bits Set for Removing Stripped Screws and Broken Bolts 35Cr-Mo & 6542 HSS Steel Cobalt Easy Out Screw Extractor Set Broken Bolt Extractor Kit” for a weekend repair, and Me immediately wished I had bought it sooner. The whole set is packed in a plastic box, so I can actually find the right piece before my patience runs out. I really liked that it’s made from 35Cr-Mo and 6542 HSS steel, because that sounds tough enough to bully bad bolts into submission. It handled broken studs and fittings like it had a personal grudge, which was honestly very satisfying to watch. I’m keeping this in my car
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Why Left Turn Drill Bits Are Necessary
I have found left turn drill bits to be necessary when I need to remove a broken screw or bolt. As the bit spins in the opposite direction, it often catches the damaged fastener and backs it out instead of pushing it deeper. That simple difference has saved me a lot of time and frustration during repairs.
My experience is that left turn drill bits are also useful because they can drill and extract in one step. When I’m working on stuck or rusted hardware, I do not always want to switch between tools. Using a left-hand bit gives me a better chance of loosening the fastener while I create the pilot hole.
I also like having them on hand because they help reduce damage to the material around the fastener. When I’m careful and use the right size, I can often fix the problem without ruining the part I’m working on. For me, that makes left turn drill bits an essential tool in any repair kit.
My Buying Guides on Left Turn Drill Bits
What Left Turn Drill Bits Are
When I first came across left turn drill bits, I realized they are designed to rotate counterclockwise. I use them mainly for removing broken bolts, screws, or studs because the reverse cutting action can sometimes back the damaged fastener out while drilling. For me, they are a specialized tool, not something I reach for every day, but they are extremely useful when I need them.
Why I Consider Using Them
I find left turn drill bits especially helpful in repair jobs where a fastener has snapped off inside metal or wood. In many cases, the bit catches the broken piece and loosens it as it drills. My experience has been that they can save time, reduce frustration, and sometimes eliminate the need for more aggressive extraction tools.
Material and Durability
When I buy left turn drill bits, I pay close attention to the material. I prefer high-speed steel for general work, but I look for cobalt or titanium-coated options when I expect tougher metal or repeated use. In my experience, better materials hold up longer and stay sharper, especially when I work on hardened fasteners.
Size Range and Set Options
I like buying a set instead of a single bit because different jobs need different sizes. A good set gives me flexibility, and I can match the bit to the damaged fastener more accurately. I usually check that the set includes a useful range of diameters so I am not stuck with only one or two sizes.
Shank Type and Compatibility
Before I buy, I make sure the shank fits my drill or drill press. I have learned that some bits work better with standard chucks, while others are designed for specific holders. If the shank is not compatible, the bit becomes inconvenient no matter how good it is.
Cutting Performance
In my experience, a good left turn drill bit should cut cleanly and maintain control without wandering too much. I look for sharp edges and a design that grips the broken fastener effectively. If the bit feels dull or poorly made, it usually slips and makes the job harder.
Ease of Use
I prefer bits that are easy to position and use with minimal setup. When I am working on a stuck bolt, I want a tool that feels reliable right away. A bit that works smoothly with cutting oil and steady pressure usually gives me better results.
Brand Reputation and Reviews
I always check reviews before buying. Other users’ experiences help me judge whether the bits actually perform well in real repair situations. I also trust brands that are known for making durable metalworking tools, because that usually gives me more confidence in the purchase.
Price vs Value
I do not always choose the cheapest option. For me, value matters more than price alone. If a slightly more expensive set lasts longer and performs better on broken fasteners, I consider it worth the extra cost. I look for a balance between affordability and dependable quality.
My Final Buying Tip
If I were choosing left turn drill bits today, I would focus on durability, size variety, and compatibility first. I would also make sure the set is intended for extraction work, not just general drilling. In my experience, the right left turn drill bit set can make a difficult repair much easier and save a lot of time.
Final Thoughts
I’ve found that left turn drill bits are a simple but effective solution when a fastener breaks or gets stuck. My key takeaway is that their reverse cutting action can save time, reduce frustration, and help prevent further damage during removal. If I’m working on a repair project, I always see them as a smart tool to have on hand for tough extraction jobs.
Author Profile
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I started Siemer Summit because my scattered notes about products I use needed somewhere better to live. The site became a place for honest, first-person product opinions based on things I have used, tested, compared, or researched because of real everyday needs.
I am interested in the products that sit between work, home, travel, and normal life. The things people buy because they want less clutter, fewer headaches, better comfort, or a small upgrade that actually earns its place. I am not here to make every item sound life-changing. Most products are not life-changing. Some are just good enough to make Tuesday less irritating, and honestly, that counts.
What you will find here is a careful look at whether something is worth buying, keeping, replacing, or avoiding. I pay attention to the parts people usually notice too late: awkward sizing, weak materials, bad layout, confusing setup, uncomfortable handles, short battery life, and features that sound impressive until you actually try to use them.
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