GEARWRENCH Nut Extractor Driver 86185 12mm Bolt Biter (Chrome Molybdenum Alloy Steel Bi-Directional Impact Metric Extraction Tool)

GEARWRENCH 86185 12mm Bolt Biter Impact Nut Extractor and Driver

The GEARWRENCH 86185 12mm Bolt Biter Nut Extractor and Driver removes and re-installs severely stripped, rusted, and frozen metric fasteners without cutting into the bolt head. Forged from impact-grade Chrome Molybdenum (Cr-Mo) alloy steel with a protective black oxide finish, this 2.56-inch extraction driver withstands extreme pneumatic and cordless impact wrench torque. Its patented bi-directional fluted gripping profile engages the flat surfaces of damaged 12mm hex hardware to deliver up to 50 times longer service life than conventional spiral-flute extraction sockets.

Best Used For:

• Automotive Brake & Suspension Service: Extracting seized, heat-cycled 12mm caliper bracket bolts and undercarriage fasteners rounded by corrosion.
• Import Engine Bay Maintenance: Loosening stripped 12mm metric valve cover and accessory bracket bolts without damaging adjacent engine castings.
• Industrial Machinery Overhaul: Re-tightening or removing rounded metric hardware in plant equipment during critical assembly repairs.

Key Performance & Safety Features

• Bi-Directional Gripping Geometry: Facilitates both removal and tightening of stripped fasteners to prevent hardware stranding during reassembly.
• Non-Cutting Flute Design: Grips the perimeter flats of rounded hardware rather than slicing into the metal, preserving fastener reusability.
• Impact-Grade Chrome Molybdenum Steel: High-tensile Cr-Mo alloy construction absorbs severe rotational shock and high-torque impact cycles.
• Tapered Entry Throat: Centers and aligns the driver effortlessly onto mushroomed, deformed, or heavily corroded hex heads.
• High-Visibility Laser Etching: Wear-resistant size markings provide permanent visual identification in dim shop environments.
• Protective Black Oxide Finish: Industrial chemical conversion coating shields the socket surface from shop chemicals, grease, and rust.

What's Included

• (1) GEARWRENCH 86185 12mm Bolt Biter Nut Extractor and Driver

Technical Specifications

Pro-Tip: Press the Bolt Biter firmly and squarely onto the rounded 12mm hex head before triggering the impact gun; the tapered flutes lock across the fastener flats to transfer immediate breakaway torque without stripping the head.