10pcs Drill Bit Set Cobalt Left Hand Accessories Broken Bolt Damaged Screw Extractor Set Metal Case Quality Perforator Tools Zpaxo Default Title

Cobalt Left Hand Drill Bit Set – Broken Bolt Screw Extractor

Q: What size are these drill bits and what fasteners are they suited for?

These drill bits are sized at 5/64", making them well-suited for smaller broken bolts, screws, and fasteners commonly found in automotive panels, appliances, and general metalworking applications. Always select a bit size slightly smaller than the fastener's core diameter for best results.

Q: What drill is required to use left-hand drill bits?

Any standard corded or cordless drill with a reverse (counter-clockwise) mode is compatible with these left-hand drill bits. Simply set your drill to reverse, apply steady pressure, and allow the bit's cutting action to engage the broken fastener.

$31.66

$31.66 $39.18

Cobalt Left Hand Drill Bit Set – Broken Bolt & Screw Extractor

Tackle stubborn fasteners with confidence using this Cobalt Left Hand Drill Bit Set. Engineered from premium High Speed Steel (HSS) with cobalt alloy, these left-hand spiral bits are specifically designed to grip and back out broken bolts, stripped screws, and seized fasteners — without the need for a separate extractor in many cases. The reverse-cutting action works with your drill's reverse mode to simultaneously drill in and unthread the damaged fastener.

Whether you're a professional mechanic, a dedicated DIYer, or tackling a one-off repair project, this set belongs in your toolbox. The 5/64" size makes it ideal for smaller fasteners and precision extraction work. Stored in a durable metal case for organisation and protection, this kit is ready whenever you need it.

Key Features

Material: High Speed Steel (HSS) with cobalt alloy for superior hardness and heat resistance
Left-Hand Spiral Flute: Reverse-cutting design helps loosen and remove broken or stripped fasteners
Size: 5/64" — ideal for precision extraction on smaller bolts and screws
Metal Case Included: Keeps bits organized, protected, and easy to transport
Compatible with Standard Drills: Works with any drill in reverse mode
Durable Build: Cobalt construction withstands high heat generated during drilling

Why Left-Hand Drill Bits?

Left-hand drill bits spin counter-clockwise, the same direction your drill runs in reverse. This means that as the bit bites into a broken bolt or screw, the torque naturally works to unthread and back it out — often extracting the fastener before you even need to reach for a separate removal tool. It's a smarter, faster approach to a frustrating problem.

Perfect For

Removing broken bolts and snapped-off screws
Extracting stripped or seized fasteners
Automotive repair and maintenance work
General metalworking and DIY projects
Workshop and professional trade use

Frequently Asked Questions

Q: What makes cobalt left-hand drill bits better for broken bolt extraction?

A: Cobalt left-hand drill bits combine two advantages in one tool. The cobalt alloy construction provides exceptional hardness and heat resistance, allowing the bit to cut through hardened steel fasteners. The left-hand (counter-clockwise) spiral flute means that as the bit engages in reverse-drill mode, the rotational torque naturally works to unthread and back out the broken bolt or screw — often removing it without any additional extractor tool.

Q: What size are these drill bits and what fasteners are they suited for?

A: These drill bits are sized at 5/64", making them well-suited for smaller broken bolts, screws, and fasteners commonly found in automotive panels, appliances, and general metalworking applications. Always select a bit size slightly smaller than the fastener's core diameter for best results.

Q: What drill is required to use left-hand drill bits?

A: Any standard corded or cordless drill with a reverse (counter-clockwise) mode is compatible with these left-hand drill bits. Simply set your drill to reverse, apply steady pressure, and allow the bit's cutting action to engage the broken fastener.

Q: Does the set come with a storage case?

A: Yes! This cobalt left-hand drill bit set comes housed in a sturdy metal case to keep your bits organised, protected from damage, and easy to find when you need them in a hurry.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.