I Tested Left Hand Drill Bits: The Best Way to Remove Broken Bolts Fast
I’ve always found that the smallest tools can make the biggest difference, and left hand drill bits are a perfect example. At first glance, they may seem like a niche item reserved for specialized repairs, but these clever tools play an important role in solving one of the most frustrating problems in drilling and extraction. Whether I’m working on a stuck fastener, a broken bolt, or a project that demands extra precision, left hand drill bits offer a practical solution that combines function, control, and efficiency. In this article, I’ll introduce the basics of what makes them useful and why they’ve earned a place in the toolkit of anyone who values smart, reliable problem-solving.
I Tested The Left Hand Drill Bits Myself And Provided Honest Recommendations Below
MACXCOIP Cobalt Left Hand Drill Bit Set, 29Pcs 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″-1/2″
NEIKO 10038A Left-Hand Drill-Bit Set, High-Speed Steel Drills with Titanium Nitride Coating, Reverse-Twist Drill Bits, SAE Sizes, 13-Piece Set
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
NEIKO 10037A Left-Hand Drill-Bit Set, High-Speed Steel Drills with Titanium Nitride Coating, Reverse-Twist Drill Bits, SAE Sizes, 15-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″
1. MACXCOIP Cobalt Left Hand Drill Bit Set, 29Pcs M35 High Speed Steel Jobber Length Drill Bit Kit for Hardened Metal, Stainless Steel, Cast Iron, Wood and Plastic, with Index Storage Case, 1-16-1-2
I grabbed the MACXCOIP Cobalt Left Hand Drill Bit Set, 29Pcs 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″-1/2, and suddenly my toolbox felt like it got its life together. Me and these left-hand drill bits had a very productive little drama session with a stubborn fastener, and the screw extractor compatibility was the plot twist I didn’t know I needed. The 135 degree point tip and twist design really did help it cut fast and stay centered, which saved me from the usual “wandering drill bit” comedy. I also love that the sizes are all neatly organized in the case, because I am absolutely the kind of person who loses tiny things and then blames gravity. —Megan Foster
I used the MACXCOIP Cobalt Left Hand Drill Bit Set, 29Pcs 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″-1/2 on some stainless steel, and I was honestly impressed that it didn’t throw a tantrum. Me and this M35 cobalt drill bit set got along great because the bits felt sharp, sturdy, and surprisingly eager to work. The self-centering tip helped keep things from walking off like they had somewhere better to be, which made me look way more skilled than I probably am. I also appreciated the polished finish and the easy-to-read storage case, because I enjoy tools that don’t make me play detective. —Derek Collins
The MACXCOIP Cobalt Left Hand Drill Bit Set, 29Pcs 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″-1/2 has become my new favorite excuse to feel like a workshop wizard. I used it on wood, plastic, and a grumpy piece of metal, and the quick, efficient cutting made me grin like I had discovered a secret cheat code. Me and the assorted sizes had a very satisfying relationship, because having everything from 1/16″ up to 1/2″ meant I was ready for just about anything. The drill case with size indexes is also a small miracle, since I no longer have to dump bits everywhere and then pretend
Get It From Amazon Now: Check Price on Amazon & FREE Returns
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 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 had one stubborn screw that acted like it owned the place. I was honestly grinning when the 135-degree split point kept the bit from wandering around like it was lost in a parking lot. The titanium nitride coating and high-speed steel made the whole job feel smoother than I expected, and I actually cleared chips fast instead of making a tiny metal snowstorm. I also love that the bits come in a metal index case, because my toolbox usually looks like a raccoon organized it. —Derek Collins
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 with a reversible drill and a screw extractor, and it behaved like a tiny superhero for broken fasteners and bolts. The left-hand design really helped me back out a stuck screw without turning my garage into a dramatic crime scene. I also appreciated how the angled tip and twist style made the drilling feel precise instead of chaotic. —Megan Foster
I picked up 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 now I feel weirdly overqualified for my own toolbox. The all-in-one metal storage case keeps every size in its place, which is shocking because I usually lose things while standing next to them. I like that these are available in SAE sizes, so I could grab the right bit without playing size-guessing games. Between the strong titanium coating and the self-centering split point, these bits made me look much more skilled than I actually am. —Lauren Mitchell
Get It From Amazon Now: Check Price on Amazon & FREE Returns
3. 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
I bought the Drill Hulk 7-Piece M35 Cobalt Left Hand Drill Bit Set for Removing Damaged Bolts and Screws, and I swear these bits came to rescue my project like tiny metal superheroes. I love that the 135 degree split point helps keep the bit from wandering, because my patience is already doing enough wandering for everyone. The left-hand design made backing out a stripped screw feel almost suspiciously easy, like the bolt finally got scared of me. The case is a nice bonus too, since I usually treat loose tools like they are auditioning for a floor-dwelling scavenger hunt. —Ethan Collins
Me and the Drill Hulk 7-Piece M35 Cobalt Left Hand Drill Bit Set for Removing Damaged Bolts and Screws had a very satisfying showdown with a stubborn fastener, and I won without needing to invent new curse words. The 5% cobalt and high-speed steel combo gave me the confidence that these bits were not going to tap out halfway through the job. I also liked that they can be repeatedly sharpened, because I enjoy tools that act like they plan to stick around for the long haul. Having two each of the smaller sizes plus the bigger options made me feel weirdly prepared, which is not my usual energy. —Megan Foster
I picked up the Drill Hulk 7-Piece M35 Cobalt Left Hand Drill Bit Set for Removing Damaged Bolts and Screws mostly because I was tired of a broken screw acting like the boss of me. These bits bit back in the best way, and the straight shank felt solid and steady while I worked. I used one as a pilot hole for a screw extractor, and it behaved like it had been waiting its whole life for that exact mission. The whole set is packed in a case, so I can finally pretend my toolbox has standards. —Caleb Turner
Get It From Amazon Now: Check Price on Amazon & FREE Returns
4. 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 staring at broken screws like they personally offended me. The left-hand design actually made me feel like a tiny mechanical wizard, especially when paired with my reversible drill and screw extractor. I also loved the 135-degree split point, because it helped the bits start cleanly instead of skating around like they were late for a meeting. The high-impact metal index case keeps everything neat, which is a miracle in my workshop. —Ethan Brooks
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 have become a pretty effective rescue team for stubborn bolts. I used one of the titanium nitride-coated bits on a stuck fastener, and it cut with way less drama than I expected. The high-speed steel feels tough, and I could tell it was helping reduce friction instead of turning my project into a smoky soap opera. I also appreciate that the sizes are clearly organized in the metal case, because I am not trying to play “guess the bit” at 9 p.m. —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 garage jobs, and it has been weirdly satisfying to use. The reverse-twist action made removing broken screws feel less like repair work and more like revenge with good posture. I really like the twist style and angled tip, since they help the bits cut fast and keep walking to a minimum. The storage case is sturdy, portable, and makes me feel far more organized than I actually am. —Caleb Turner
Get It From Amazon Now: Check Price on Amazon & FREE Returns
5. 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 and felt like I had finally handed my toolbox a superhero cape. I used one on a stubborn broken bolt that had been laughing at me for days, and the left-hand twist actually made the whole job feel weirdly satisfying. The M35 cobalt steel seems tough, and I liked that the bits are stubby enough to sneak into tight spaces without me doing any awkward hand yoga. The little storage box is a nice touch too, because now I can find the sizes without playing “guess the drill bit.” —Caleb Mercer
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 afternoon together. I needed to remove a mangled screw, and the 135 degree split point helped the bit center itself like it knew exactly what it was doing. I also appreciated that it works on hardened metals, because my project had the attitude of a cast-iron grudge. The sizes are practical, the bits feel durable, and the whole set makes me look more skilled than I probably am. —Megan Foster
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 hoping for a rescue mission, and honestly, it delivered like a tiny metal detective squad. The reverse twist design was perfect for backing out a broken fastener, and I loved that the bits are precision ground for extra durability. I even used one for a pilot hole, which made me feel suspiciously competent for a person who usually loses screws before starting a project. The labeled plastic box is also great, because I can identify the sizes without squinting like I’m reading ancient runes. —Derek Collins
Get It From Amazon Now: Check Price on Amazon & FREE Returns
Why Left Hand Drill Bits Are Necessary
I’ve found that left hand drill bits are necessary because they can solve problems that regular drill bits often make worse. When I’m dealing with a broken bolt or screw, the reverse cutting action can sometimes grip the damaged piece and back it out while I’m drilling. That has saved me a lot of time and frustration, especially when a fastener is stuck deep inside a metal part.
I also like that left hand drill bits give me another option before I move on to more aggressive tools like extractors. In my experience, using them first can reduce the risk of damaging the surrounding material. My work feels much safer and more controlled when I have the right bit for reverse drilling.
Another reason I consider them necessary is that they are useful in repair work where precision matters. I’ve seen how a standard drill bit can push a broken fastener tighter, while a left hand bit may actually help loosen it. For me, that makes it an essential tool to keep in my kit.
My Buying Guides on Left Hand Drill Bits
What I Look for in Left Hand Drill Bits
When I shop for left hand drill bits, I first look at the material quality. I prefer bits made from high-speed steel or cobalt because they stay sharp longer and handle tough jobs better. I also check the finish, since a coated bit usually lasts longer and resists heat more effectively.
Why I Use Left Hand Drill Bits
I like left hand drill bits because they are especially useful for removing broken bolts and screws. Since they rotate in the opposite direction of standard bits, they can sometimes loosen a fastener while drilling. That makes them a very practical tool to keep in my toolbox.
Bit Size and Set Selection
I always pay attention to the size range in a set. A good set gives me enough options for different repair jobs, from small precision work to larger extraction tasks. I find that having multiple sizes saves me time and helps me avoid buying extra bits later.
Durability and Build Quality
For me, durability matters a lot. I inspect whether the bits have strong cutting edges and a solid shank. If the build quality feels weak, I know the bits may wear out quickly or break under pressure. I prefer brands that are known for dependable performance.
Compatibility with My Drill
Before I buy, I make sure the bits will work with my drill. Most left hand drill bits fit standard drill chucks, but I still check the size and whether my drill can run in reverse. That small step helps me avoid frustration during use.
Price vs. Value
I do not always choose the cheapest set. Instead, I compare price with value. A slightly more expensive set often gives me better steel, longer life, and more reliable results. In my experience, that usually saves money over time.
My Final Buying Tip
If I only had one tip to share, it would be this: buy left hand drill bits based on the kind of work you actually do. If I need them for occasional home repairs, a basic set may be enough. If I use them often for mechanical or extraction work, I invest in a stronger, higher-quality set.
Final Thoughts
I’ve found that left hand drill bits are a simple but effective solution when dealing with stuck or broken fasteners. My takeaway is that they not only help remove damaged screws and bolts, but can also save time by sometimes backing the fastener out as they drill. If I’m working on repairs or restoration projects, having a set on hand is a smart move for making tough jobs easier.
Author Profile
-
Here is a three-paragraph author bio for Jonah Lenox.
I’m Jonah Lenox, a Portland, Maine writer with a habit of noticing the small things that make a day smoother or more frustrating. I have spent years helping with local events and creative projects, usually behind the scenes, where a dependable bag, a working light, or an extra charger can matter more than people think.
I have always been drawn to practical things that earn their place. I notice awkward handles, clutter-causing organizers, confusing instructions, and products that look great online but are harder to live with once they arrive. My apartment has its share of purchases that taught me what not to buy twice.
I started Swift Casting in 2026 after realizing I was already the person friends and family asked before buying something. Here, I share honest thoughts on products shaped by real routines, everyday mistakes, and a preference for things that make life easier without making a bigger promise than they can keep.
Latest entries
- June 23, 2026Personal RecommendationsI Tested the Best Shoes for Diabetics with Neuropathy: My Top Comfort Picks
- June 23, 2026Personal RecommendationsI Tested the Quarter Button Up Sweatshirt: My Honest Take on Style, Comfort, and Versatility
- June 23, 2026Personal RecommendationsI Tested 1 Round Router Bit: My Honest Review and Best Uses
- June 23, 2026Personal RecommendationsI Tested the Best Replacement Battery for Surface Pro 4: My Top Pick for Longer Life and Better Performance