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

What people love (and don’t love)

What people love

Effective at extracting broken bolts and studs, especially with hard-to-remove titanium and steel bolts.
High-speed steel bits with titanium nitride coating offer good durability and cutting ability on hard materials.
Left-hand twist design aids in loosening bolts by drilling in reverse, often backing bolts out quickly.
Compact 15-piece set covers a wide range of SAE sizes for various applications.
Well-regarded by DIYers and automotive users for home repairs and extracting stripped bolts.

What people don’t love

Some bits break easily when used on very hardened bolts or without proper cutting oil.
Case lid can be very tight, causing bits to scatter when opened abruptly.
Not always effective on extremely tough or heat-hardened bolts; occasional failures reported.
Perceived as lower quality compared to professional-grade tools, described as typical “cheap” drill bits in some reviews.

A solid, affordable left-hand drill bit set that works well for most broken bolt removal jobs when used carefully with cutting oil.

Summary based on customer review evidence.

Check price on Amazon

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.

You can view the current price and full details on Amazon here.

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.