Retail packaging of the GearWrench 30-piece Bolt Biter extraction insert set, featuring descriptive icons that highlight its 70 percent thinner profile and ability to remove rusted or rounded fasteners.
Top-down view of the open GearWrench 86193 Bolt Biter set, displaying 30 assorted SAE and metric extraction inserts neatly organized in a high-visibility orange foam tray within a black and clear protective case.
An angled perspective of the open GearWrench Bolt Biter wrench insert set, showcasing the slim profile of the chrome molybdenum extraction tools designed for removing rounded and frozen fasteners in tight spaces.
The GearWrench 86193 set in its closed, compact storage case, featuring a clear lid with the GearWrench logo and a secure orange latch for easy transport and jobsite organization.
A comprehensive lineup of all 30 GearWrench Bolt Biter inserts, illustrating the wide range of SAE and metric sizes and the tapered entry design that enables easy seating on damaged bolts.
Close-up view of a single GearWrench Bolt Biter wrench insert, highlighting the 19mm and 3/4 inch dual-size laser markings and the specialized internal gripping teeth for bi-directional extraction.
Rear view of a Bolt Biter insert, showing the high-strength magnetic retention disc that keeps the extraction tool securely seated inside a standard wrench during high-torque applications.
Action shot demonstrating a GearWrench Bolt Biter insert being used with a ratcheting wrench to remove a heavily rusted and damaged bolt from a vehicle's suspension component.
The GearWrench 86193 set displayed in a rugged industrial environment alongside other professional tools, emphasizing its durability and effectiveness for heavy-duty maintenance and repair.
Retail packaging of the GearWrench 30-piece Bolt Biter extraction insert set, featuring descriptive icons that highlight its 70 percent thinner profile and ability to remove rusted or rounded fasteners.
Top-down view of the open GearWrench 86193 Bolt Biter set, displaying 30 assorted SAE and metric extraction inserts neatly organized in a high-visibility orange foam tray within a black and clear protective case.
An angled perspective of the open GearWrench Bolt Biter wrench insert set, showcasing the slim profile of the chrome molybdenum extraction tools designed for removing rounded and frozen fasteners in tight spaces.
The GearWrench 86193 set in its closed, compact storage case, featuring a clear lid with the GearWrench logo and a secure orange latch for easy transport and jobsite organization.
A comprehensive lineup of all 30 GearWrench Bolt Biter inserts, illustrating the wide range of SAE and metric sizes and the tapered entry design that enables easy seating on damaged bolts.
Close-up view of a single GearWrench Bolt Biter wrench insert, highlighting the 19mm and 3/4 inch dual-size laser markings and the specialized internal gripping teeth for bi-directional extraction.
Rear view of a Bolt Biter insert, showing the high-strength magnetic retention disc that keeps the extraction tool securely seated inside a standard wrench during high-torque applications.
Action shot demonstrating a GearWrench Bolt Biter insert being used with a ratcheting wrench to remove a heavily rusted and damaged bolt from a vehicle's suspension component.
The GearWrench 86193 set displayed in a rugged industrial environment alongside other professional tools, emphasizing its durability and effectiveness for heavy-duty maintenance and repair.
GEARWRENCH

GearWrench Extractor Insert Set 86193 1/4 to 3/4 Inch 30 Piece Bolt Biter Kit (Magnetic Bi-Directional Cr-Mo Steel SAE Metric Rounded Nut Removal)

In stock
SKU: 86193
$93.99 USD
$149.00 USD Sale $93.99 USD

Description

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GearWrench 86193 30-Piece Bolt Biter™ SAE & Metric Damaged Fastener Wrench Insert Set

The GearWrench 86193 30-piece Bolt Biter™ SAE and metric wrench insert set extracts stripped, severely corroded, and rounded hexagonal fasteners ranging from 1/4 inch to 3/4 inch and 7mm to 19mm in restrictive automotive spaces. Engineered with a low-profile geometry that is 70% thinner than traditional extraction sockets, these specialized inserts seat directly inside standard 6-point, 12-point, and spline ratcheting or combination wrenches using a high-retention magnetic collar. Outfitted with patented bi-directional gripping flutes for removing and re-tightening compromised hardware, tapered entry throats that eliminate the need for hammer seating, minus-sized increments for severely decayed fastener heads, and durable Chrome-Molybdenum alloy steel finished in corrosion-resistant manganese phosphate, it equips automotive technicians, industrial millwrights, and heavy equipment mechanics with dependable extraction capability.

Best Used For:

  • Confined Engine Bay Fastener Extraction: Removing stripped exhaust manifold studs, rusted turbo housing bolts, and frozen thermostat hardware located in tight clearances where standard extraction sockets cannot fit.
  • Corroded Automotive Chassis and Brake Hardware: Gripping severely rounded brake caliper bracket bolts, steering components, and rusted suspension fasteners without slippage.
  • Re-Tightening Damaged Temporary Bolts: Engaging compromised bolt heads in reverse to securely re-tighten hardware temporarily when immediate replacement fasteners are unavailable.

Key Performance & Safety Features

  • Ultra-Slim 70% Thinner Profile: Low-profile construction fits flush inside open-end, box-end, and ratcheting wrenches to access tight clearances between chassis obstacles and firewall panels.
  • Patented Bi-Directional Gripping: Dual-direction internal flute geometry grips damaged fasteners during counterclockwise extraction and clockwise installation.
  • Integrated Magnetic Retention Collar: Powerful neodymium magnets hold each insert securely inside 6-point, 12-point, and spline wrench openings to prevent dislodging during high-torque turning.
  • Tapered Self-Centering Entry: Guided lead-in angle slips smoothly over mushroomed and distorted bolt heads without requiring hammer strikes to seat the tool.
  • Dedicated Minus-Size Increments: Includes specialized undersized increments to bite firmly into fasteners reduced in size by heavy rust scale and abrasive wear.
  • Chrome-Molybdenum (Cr-Mo) Steel: High-tensile forged alloy core with a manganese phosphate chemical finish withstands extreme torque while resisting corrosive shop chemicals.

What's Included

  • (30) GearWrench Bolt Biter™ SAE & Metric Extraction Wrench Inserts:
    • SAE Fastener Coverage: 1/4"-, 1/4", 1/4"+, 5/16"-, 5/16", 5/16"+, 3/8"-, 3/8", 3/8"+, 7/16"-, 7/16", 7/16"+, 1/2"-, 1/2", 1/2"+, 9/16"-, 9/16", 9/16"+, 5/8"-, 5/8", 5/8"+, 11/16"-, 11/16", 11/16"+, 3/4"-, 3/4", 3/4"+
    • Metric Fastener Coverage: 7mm (0.276 in.) to 19mm (0.748 in.) with Dedicated Minus and Plus Increments
  • (1) Heavy-Duty Fitted Injection-Molded Storage Carrying Case with Laser-Etched Sizing

Technical Specifications

Manufacturer Brand GearWrench (Apex Tool Group)
Model Part Number 86193
Product Tool Class Bolt Biter™ Damaged Fastener Wrench Insert Set
Total Set Piece Count 30 Individual Extraction Inserts
Fastener Size Range (SAE) 0.250 in. to 0.750 in. (1/4 in. to 3/4 in.)
Fastener Size Range (Metric) 0.276 in. to 0.748 in. (7mm to 19mm)
Material Metallurgy Drop-Forged Chrome-Molybdenum (Cr-Mo) Alloy Steel
Protective Exterior Finish Industrial Manganese Phosphate Coating
Gripping Mechanism Patented Bi-Directional Flute Geometry
Tool Retention Profile High-Strength Magnetic Base Collar
Wrench Drive Compatibility 6-Point, 12-Point, & Spline Box/Ratcheting Wrenches
Total Net Set Weight 2.30 lbs (36.80 oz / 1.04 kg)
Storage Enclosure Heavy-Duty Custom-Fitted Injection Molded Case
Suitable for material type Rusted Steel, Rounded Hex Heads, & Corroded Studs

Pro-Tip: If standard insert sizing slips on heavily rusted hardware, select the corresponding minus-size (-) insert; its reduced internal diameter seats tightly against corroded metal flats, delivering instant traction without damaging your ratcheting wrench.