The full 8-piece set of GEARWRENCH Bolt Biter nut extractor drivers, including all SAE and Metric sizes, arranged in a row on a white background.
The GEARWRENCH 8-piece Bolt Biter nut extractor and driver set, model 86170, shown in its official retail blister pack packaging.
An informational graphic of a GEARWRENCH Bolt Biter Nut Driver with callouts pointing to its features: "Tapered entry," "Minus and dual sized sockets," "Bi-directional design," "50X longer impact life," and "CR-MO" on the hex shank.
The complete 8-piece GEARWRENCH Bolt Biter nut extractor driver set, model 86170, organized in the two included gray storage rails.
A studio photo of the 1/2-inch GEARWRENCH Bolt Biter nut extractor driver, model 86170, on a white background.
A close-up three-quarter view of the 12mm GEARWRENCH Bolt Biter nut extractor driver, showing the tapered, fluted socket end.
A close-up three-quarter view of the 1/2-inch GEARWRENCH Bolt Biter nut extractor driver, model 86170, isolated on a white background.
The full 8-piece set of GEARWRENCH Bolt Biter nut extractor drivers, including all SAE and Metric sizes, arranged in a row on a white background.
A GEARWRENCH Bolt Biter nut extractor driver, model 86170, is shown in use, inserted into a power tool and removing a worn, rounded bolt from a piece of machinery.
A GEARWRENCH Bolt Biter nut extractor driver, model 86170, is shown connected to an impact driver and positioned over a rusted bolt on a dark metal surface.
The full 8-piece set of GEARWRENCH Bolt Biter nut extractor drivers, including all SAE and Metric sizes, arranged in a row on a white background.
The GEARWRENCH 8-piece Bolt Biter nut extractor and driver set, model 86170, shown in its official retail blister pack packaging.
An informational graphic of a GEARWRENCH Bolt Biter Nut Driver with callouts pointing to its features: "Tapered entry," "Minus and dual sized sockets," "Bi-directional design," "50X longer impact life," and "CR-MO" on the hex shank.
The complete 8-piece GEARWRENCH Bolt Biter nut extractor driver set, model 86170, organized in the two included gray storage rails.
A studio photo of the 1/2-inch GEARWRENCH Bolt Biter nut extractor driver, model 86170, on a white background.
A close-up three-quarter view of the 12mm GEARWRENCH Bolt Biter nut extractor driver, showing the tapered, fluted socket end.
A close-up three-quarter view of the 1/2-inch GEARWRENCH Bolt Biter nut extractor driver, model 86170, isolated on a white background.
The full 8-piece set of GEARWRENCH Bolt Biter nut extractor drivers, including all SAE and Metric sizes, arranged in a row on a white background.
A GEARWRENCH Bolt Biter nut extractor driver, model 86170, is shown in use, inserted into a power tool and removing a worn, rounded bolt from a piece of machinery.
A GEARWRENCH Bolt Biter nut extractor driver, model 86170, is shown connected to an impact driver and positioned over a rusted bolt on a dark metal surface.
GEARWRENCH

GearWrench Nut Driver Extractor Set 86170 1/4 to 1/2 Inch 8 Piece Bolt Biter Kit (Chrome Moly Steel Bi Directional Damaged Hardware Extraction)

In stock
SKU: 86170
$29.99 USD
$47.72 USD Sale $29.99 USD

Description

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GearWrench 86170 8-Piece Bolt Biter™ Impact Nut Extractor & Driver Set

The GearWrench 86170 8-piece Bolt Biter™ impact nut extractor and driver set removes, loosens, and tightens severely rounded, stripped, rusted, and frozen fasteners across SAE and metric sizes from 1/4-inch to 1/2-inch (7mm to 13mm). Drop-forged from high-strength chrome molybdenum (Cr-Mo) alloy steel with an industrial black oxide protective finish, each nut driver features an impact-ready torsion zone and patented bi-directional tapered flutes that grip damaged fastener heads securely without cutting into or destroying the hardware. Outfitted with dual-dimension SAE/Metric sizing capabilities, standard 1/4-inch quick-change hex shanks, and a pivoting GEARCASE modular storage rail, it equips automotive mechanics, HVAC technicians, and industrial maintenance personnel with up to 50 times longer extraction life under continuous high-torque cordless impact driver operation.

Best Used For:

  • HVAC and Sheet Metal Equipment Maintenance: Extracting rusted sheet metal screws, seized furnace burner fasteners, and corroded condensing unit hardware without destroying thin panels.
  • Automotive Engine Bay and Undercarriage Service: Backing out stripped battery terminal nuts, rounded intake manifold bolts, and seized small-diameter hose clamps with 1/4-inch impact drivers.
  • Commercial Facility and Industrial Assembly Repair: Removing frozen machine nuts and reinstalling reusable hardware temporarily in high-vibration manufacturing environments.

Key Performance & Safety Features

  • Bi-Directional Gripping Architecture: Patented tapered flutes seat firmly onto fastener heads in both forward and reverse directions to remove and re-install damaged hardware.
  • High-Torque Impact Torsion Zone: Engineered flex zone absorbs intense rotational peak impacts to withstand continuous cordless impact driver cycling without snapping.
  • Drop-Forged Chrome Molybdenum Steel: High-tensile Cr-Mo alloy construction delivers up to 50 times longer operational life than standard spiral cutting extractors.
  • Dual-Dimension Sizing Compatibility: Engineered socket cavities fit both SAE and metric fractional fastener counterparts across common industrial hardware sizes.
  • 1/4-Inch Quick-Connect Hex Shanks: Universal power groove shank locks directly into cordless impact drivers, drill chucks, and quick-change bit holders.
  • Pivoting GEARCASE Modular Rail: Heavy-duty storage rail with pivoting clips provides quick driver accessibility and snaps into modular tool organizers.

What's Included

  • (8) Bolt Biter™ Nut Extractor Driver Sockets: 1/4" (7mm), 5/16" (8mm), 3/8", 10mm, 7/16" (11mm), 12mm, 1/2", 13mm
  • (1) Pivoting GEARCASE Insert Storage Rail

Technical Specifications

Manufacturer Brand GearWrench (Apex Tool Group)
Model Part Number 86170
Product Line Family Bolt Biter™ Extraction Series
Total Set Piece Count 8-Piece Extraction Driver Set with Rail
Measurement Standard Dual Standard: SAE (Imperial) & Metric (Millimeter)
Fastener Sizing Range 1/4 in. to 1/2 in. (0.276 in. / 7.00 mm to 0.512 in. / 13.00 mm)
Drive Shank Interface 0.250 Inches (1/4 in. Hex Power Groove Shank)
Material Composition Drop-Forged Chrome Molybdenum (Cr-Mo) Alloy Steel
Protective Surface Finish Industrial Corrosion-Resistant Black Oxide Coating
Drive Profile Configuration Bi-Directional Non-Damaging Tapered Flute Entry
Impact Rating Standard Impact Rated with Torsion Flex Zone
Total Net Tool Weight 0.661 lbs (10.58 oz / 300.00 g)
Universal Product Code (UPC) 099575861703
Suitable for material type Rusted Steel Hex Nuts, Rounded Sheet Metal Screws, & Studs

Pro-Tip: When extracting heavily painted or rusted hex hardware, press the Bolt Biter driver firmly straight onto the head while running your impact driver in reverse at low speed; the tapered flutes will bite into the undamaged shoulder of the hex and spin the hardware out without jamming inside the socket.