NEIKO 10037A Left-Hand Drill Bit Set (15-Piece)

What people love (and don’t love)

What people love

Effective at removing broken bolts and studs, especially with proper use and cutting oil.
Good quality material with titanium nitride coating that improves durability.
Includes a range of sizes suitable for small and tough bolts, like titanium and hardened steel.
Compact set with a convenient case to keep bits organized.
Highly recommended for DIYers and engineers for extracting broken fasteners.
Positive impact on saving costly repairs by enabling bolt removal at home.

What people don’t love

Bits can break under heavy or hardened stress, especially without patience or care.
Case lid is very tight and can release bits unexpectedly when opened.
Not ideal for professional-grade or extremely tough jobs.
Some users report quality inconsistencies and broke bits quickly.
May require multiple drilling steps on very hard materials like titanium.

Reliable left-hand drill bit set for occasional use, best handled with care and patience.

Summary based on customer review evidence.

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Quick facts

Brand: ‎NEIKO
Price: USD 23.00
Rating: 4.10 (7997 reviews)

The NEIKO 10037A Left-Hand Drill-Bit Set is built for jobs where standard bits don’t help—especially when you’re trying to back out broken screws, bolts, studs, or other stuck fasteners. These reverse-twist bits are designed for use with reversible drills, often alongside screw extractors, to support common repair work in the home, garage, or shop.

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Each bit features a twist style with an angled tip and a 135-degree split point for self-centering starts. That geometry helps reduce walking and improves chip clearing for smoother drilling in metal and steel. The bits are made from high-speed steel and finished with a titanium nitride coating to increase surface hardness and help reduce friction between the bit and the workpiece.

Left-hand (reverse-twist) design intended for use with reversible drills and screw extractors
High-speed steel construction with titanium nitride coating for added surface hardness and reduced friction
135° split-point tip helps self-center, reduce walking, and start holes more accurately
Twist-drill style helps clear chips and particles while drilling
Includes a high-impact metal index storage case with labeled slots for organization and portability

If you frequently deal with seized or broken fasteners in automotive or home repair, this 15-piece SAE set is a practical add-on to your toolkit—keeping sizes organized and ready when you need them.