A studio shot of the GearWrench 86177 Bolt Biter nut extractor and driver featuring a high-torque torsion zone, a black and yellow industrial finish, and a Chrome Molybdenum steel body designed for the removal of damaged 8mm or 5/16 inch fasteners.
A close-up view looking into the specialized gripping flutes of the Bolt Biter nut driver, showcasing the bi-directional tapered entry design that allows for both tightening and loosening of rounded-off nuts and bolts.
An action shot of the GearWrench Bolt Biter nut extractor attached to a cordless impact driver, successfully gripping and removing a heavily corroded and rounded fastener from an automotive engine component.
A perspective view of the 86177 Bolt Biter being used with a professional impact tool to extract a frozen fastener from an industrial machinery housing, highlighting its high-access slim profile.
A detailed application shot showing the GearWrench nut extractor driver reaching into a cramped engine bay to remove a stripped bolt, demonstrating the efficiency of the Bolt Biter technology in tight automotive spaces.
An overhead view of the GearWrench 86177 Bolt Biter nut driver in use on a metal assembly, showcasing the high-visibility laser-etched markings for 8mm and 5/16 inch sizes under professional shop lighting.
A studio shot of the GearWrench 86177 Bolt Biter nut extractor and driver featuring a high-torque torsion zone, a black and yellow industrial finish, and a Chrome Molybdenum steel body designed for the removal of damaged 8mm or 5/16 inch fasteners.
A close-up view looking into the specialized gripping flutes of the Bolt Biter nut driver, showcasing the bi-directional tapered entry design that allows for both tightening and loosening of rounded-off nuts and bolts.
An action shot of the GearWrench Bolt Biter nut extractor attached to a cordless impact driver, successfully gripping and removing a heavily corroded and rounded fastener from an automotive engine component.
A perspective view of the 86177 Bolt Biter being used with a professional impact tool to extract a frozen fastener from an industrial machinery housing, highlighting its high-access slim profile.
A detailed application shot showing the GearWrench nut extractor driver reaching into a cramped engine bay to remove a stripped bolt, demonstrating the efficiency of the Bolt Biter technology in tight automotive spaces.
An overhead view of the GearWrench 86177 Bolt Biter nut driver in use on a metal assembly, showcasing the high-visibility laser-etched markings for 8mm and 5/16 inch sizes under professional shop lighting.
GEARWRENCH

GearWrench 86177 Bolt Biter 8mm 5/16 Inch Impact Nut Extractor Driver Bi-Directional Damage Fastener Removal Tool Chrome Molybdenum Alloy Steel Black

In stock
SKU: 86177
$5.99
$7.16 Sale $5.99

Description

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Redefine Extraction: GearWrench Bolt Biter™ High-Torque Nut Extractor & Driver

Stop struggling with stripped hardware and get back to work with the GearWrench 86177 Bolt Biter™ 8mm (5/16") Nut Extractor. Engineered for the professional mechanic and industrial technician, this revolutionary tool is specifically designed to grip and remove rounded-out, frozen, and heavily damaged fasteners. Unlike traditional extractors that cut into the metal and weaken the fastener, Bolt Biter™ technology uses a specialized gripping design that seats quickly and safely. This unique approach not only ensures a successful removal every time but also allows the tool to last up to 50x longer than the competition, making it a permanent and reliable solution for your most frustrating repair tasks.

Constructed from premium Chrome Molybdenum (Cr-Mo) alloy steel, this impact-ready driver features a built-in torsion zone to handle the extreme torque of cordless impact wrenches without shattering. The bi-directional design is a game-changer, allowing you to both loosen and tighten damaged fasteners as needed for alignment or extraction. With its dual-size compatibility for both SAE and Metric hardware and a tapered entry for easy seating, the 86177 is the ultimate time-saver in the shop. Finished with a corrosion-resistant black oxide coating and high-visibility laser markings, this industrial-strength tool is built to perform in the harshest environments.

Key Features

  • Bi-Directional Gripping: Engineered to both remove and tighten damaged fasteners with equal efficiency.
  • 50X Longer Life: Advanced torsion zone and gripping technology outperform standard cutting extractors.
  • Impact Ready: Forged from Chrome Molybdenum alloy steel for industrial strength under high-torque loads.
  • Tapered Entry: Innovative design easily seats onto fasteners, even those with significant material loss.
  • Dual Size Compatibility: Precision engineered to work seamlessly with both 8mm Metric and 5/16" SAE fasteners.
  • High Visibility: Laser-etched size markings and black oxide finish ensure quick identification and rust resistance.
  • Professional Grade: Meets or exceeds all ANSI and ASME performance specifications.

What's Included

  • (1) 86177 Bolt Biter™ 8mm [5/16"] Nut Extractor & Driver

Product Specifications

Brand GearWrench
Model Number 86177
Size 8mm [5/16 in]
Material Chrome-Molybdenum (Cr-Mo)
Overall Length 2.56 in
Drive Type Extraction / Nut Driver
Finish Black Oxide
Weight 0.066 lbs
ANSI/ASME Meets or Exceeds
Magnetic No
Warranty Full Lifetime

Pro-Tip: To ensure the best grip on a severely rounded nut, use a hammer to lightly tap the Bolt Biter™ onto the fastener until it is fully seated before engaging your impact driver. This "pre-setting" allows the tapered internal flutes to lock onto the remaining flat surfaces of the fastener, significantly reducing the chance of the tool slipping under high torque.