GEARWRENCH Nut Extractor Driver 86178 3/8 Inch Bolt Biter (Chrome Molybdenum Alloy Steel Bi-Directional Impact Extraction Tool)

GEARWRENCH 86178 3/8-Inch Bolt Biter Impact Nut Extractor and Driver

The GEARWRENCH 86178 3/8-Inch Bolt Biter Nut Extractor and Driver removes and re-installs severely rounded, rusted, and frozen fractional fasteners without cutting into the bolt head. Forged from impact-grade Chrome Molybdenum (Cr-Mo) alloy steel with a corrosion-resistant black oxide finish, this 2.56-inch extraction driver withstands extreme pneumatic and cordless impact gun torque. Its patented bi-directional fluted gripping mechanism seats over damaged 3/8-inch hex hardware to deliver up to 50 times longer service life than conventional spiral-flute extractors.

Best Used For:

• Automotive Exhaust & Chassis Repair: Removing seized, heat-cycled 3/8-inch manifold nuts and undercarriage bolts stripped by road salt corrosion.
• Industrial Plant Maintenance: Backing out rounded machinery bolts and re-tightening damaged hardware in critical downtime situations.
• Heavy Equipment Service: Driving high-torque cordless impact wrenches onto rusted hex heads without shearing fastener bodies.

Key Performance & Safety Features

• Bi-Directional Fluted Geometry: Enables both removal and tightening of stripped fasteners to prevent hardware stranding during reassembly.
• Non-Cutting Grip Design: Grips the perimeter flats of rounded hardware rather than slicing into the steel, preserving fastener integrity.
• 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 immediate visual identification on the job.
• Protective Black Oxide Finish: Industrial chemical conversion coating shields the socket surface from shop chemicals, grease, and rust.

What's Included

• (1) GEARWRENCH 86178 3/8-Inch Bolt Biter Nut Extractor and Driver

Technical Specifications

Pro-Tip: Press the Bolt Biter firmly and squarely onto the damaged 3/8-inch hex head before engaging your impact gun; the tapered internal flutes wedge across the remaining fastener flats to deliver instant rotational bite without cam-out.