A studio shot of the GEARWRENCH 86190 Bolt Biter 5-piece SAE wrench insert set featuring low-profile extraction tools in sizes ranging from 1/4 inch to 1/2 inch, designed for the removal of damaged and rounded fasteners.
A close-up view of the GEARWRENCH 13mm and 1/2-inch Bolt Biter wrench insert, showcasing the bi-directional internal gripping flutes and the tapered entry design for easy seating on stripped hardware.
The reverse side of a Bolt Biter wrench insert showing the hex base design, compatible with standard 6-point, 12-point, and spline wrenches for high-torque mechanical applications.
A high-angle view of the GEARWRENCH Bolt Biter wrench insert set securely organized in its durable injection-molded carrying case with a clear lid for easy tool identification.
An open view of the Bolt Biter carrying case featuring the 5-piece SAE extraction set embedded in protective foam, highlighting the compact and portable design for professional mechanics.
An overhead perspective of the 86190 Bolt Biter set in its storage case, emphasizing the high-visibility laser-etched markings on each Chrome Molybdenum steel insert.
The professional retail carded packaging for the GEARWRENCH 86190 Bolt Biter set, identifying it as a 5-piece SAE extraction insert set that removes rusted and rounded fasteners while being 70 percent thinner than standard sockets.
An informative product graphic for the Bolt Biter wrench inserts highlighting key technical features: the innovative tapered entry, bi-direction design, magnetic retention, and compact profile for 70 percent greater access.
An action shot of a technician using a ratcheting wrench with a GEARWRENCH Bolt Biter insert to remove a severely corroded bleeder valve on an automotive brake caliper assembly.
A lifestyle shot of the GEARWRENCH Bolt Biter wrench inserts and storage case on a professional workbench next to industrial tools, showcasing their rugged alloy steel construction and manganese phosphate finish.
How to remove a rounded rusty bolt - GEARWRENCH® Bolt Biter™ - (84782, 84783 & 84784) promotional how to video
A studio shot of the GEARWRENCH 86190 Bolt Biter 5-piece SAE wrench insert set featuring low-profile extraction tools in sizes ranging from 1/4 inch to 1/2 inch, designed for the removal of damaged and rounded fasteners.
A close-up view of the GEARWRENCH 13mm and 1/2-inch Bolt Biter wrench insert, showcasing the bi-directional internal gripping flutes and the tapered entry design for easy seating on stripped hardware.
The reverse side of a Bolt Biter wrench insert showing the hex base design, compatible with standard 6-point, 12-point, and spline wrenches for high-torque mechanical applications.
A high-angle view of the GEARWRENCH Bolt Biter wrench insert set securely organized in its durable injection-molded carrying case with a clear lid for easy tool identification.
An open view of the Bolt Biter carrying case featuring the 5-piece SAE extraction set embedded in protective foam, highlighting the compact and portable design for professional mechanics.
An overhead perspective of the 86190 Bolt Biter set in its storage case, emphasizing the high-visibility laser-etched markings on each Chrome Molybdenum steel insert.
The professional retail carded packaging for the GEARWRENCH 86190 Bolt Biter set, identifying it as a 5-piece SAE extraction insert set that removes rusted and rounded fasteners while being 70 percent thinner than standard sockets.
An informative product graphic for the Bolt Biter wrench inserts highlighting key technical features: the innovative tapered entry, bi-direction design, magnetic retention, and compact profile for 70 percent greater access.
An action shot of a technician using a ratcheting wrench with a GEARWRENCH Bolt Biter insert to remove a severely corroded bleeder valve on an automotive brake caliper assembly.
A lifestyle shot of the GEARWRENCH Bolt Biter wrench inserts and storage case on a professional workbench next to industrial tools, showcasing their rugged alloy steel construction and manganese phosphate finish.
How to remove a rounded rusty bolt - GEARWRENCH® Bolt Biter™ - (84782, 84783 & 84784) promotional how to video
GEARWRENCH

GearWrench Wrench Insert Set 86190 5 Piece Bolt Biter Kit (Cr Mo Alloy Steel Low Profile Damaged Fastener Removal Power Tool Accessory)

In stock
SKU: 86190
$18.99 USD

Description

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GearWrench 86190 Bolt Biter™ 5-Piece SAE Low-Profile Wrench Insert Set

The GearWrench 86190 Bolt Biter™ 5-piece SAE wrench insert set removes, loosens, and tightens stripped, rusted, or rounded 1/4-inch to 1/2-inch fasteners inside confined engine bays and tight spaces where standard extraction sockets cannot fit. Forged from high-grade chrome molybdenum (Cr-Mo) alloy steel with a corrosion-resistant manganese phosphate finish, these ultra-low-profile inserts are 70% thinner than traditional extraction tools and transform standard ratcheting or open-end wrenches into high-performance extraction systems. Outfitted with tapered entry flutes, bi-directional gripping geometry, integrated magnetic retention, and a durable injection-molded storage case, it equips automotive mechanics and industrial technicians with precision extraction capabilities in restricted access zones.

Best Used For:

  • Restricted Space Engine Bay Repair: Extracting rounded or stripped bolts tucked deep within cramped automotive engine compartments and undercarriages.
  • Industrial Machinery Maintenance: Removing rusted or frozen hardware on industrial plant equipment where clearance height is severely limited.
  • Plumbing and Fitting Restoration: Gripping and turning damaged threaded pipe fittings, rounded fittings, and corroded fasteners in tight wall recesses.

Key Performance & Safety Features

  • Ultra-Thin 70% Thinner Profile: Low-profile engineering provides unmatched physical clearance to reach damaged fasteners in extremely tight workspaces.
  • Bi-Directional Extraction Flutes: Specialized internal geometry enables both loosening and tightening actions to walk frozen bolts out of housings safely.
  • Integrated Magnetic Retention: Built-in magnetic system locks each insert securely inside the wrench opening to prevent dropping during application.
  • Chrome Molybdenum (Cr-Mo) Metallurgy: Premium alloy steel construction withstands high-torque twisting loads without cracking or deforming.
  • Universal Wrench Compatibility: Hex base design works seamlessly with standard 6-point, 12-point, spline, and open-end wrenches.
  • Tapered Entry Design: Allows inserts to seat quickly and securely onto fasteners that have lost significant head material.

What's Included

  • (1) 1/4" Bolt Biter™ Wrench Insert
  • (1) 5/16" (8mm) Bolt Biter™ Wrench Insert
  • (1) 3/8" Bolt Biter™ Wrench Insert
  • (1) 7/16" (11mm) Bolt Biter™ Wrench Insert
  • (1) 1/2" Bolt Biter™ Wrench Insert
  • (1) Durable Injection Molded Storage Case

Technical Specifications

Manufacturer Brand GearWrench (Apex Tool Group)
Model Part Number 86190
Product Line Family Bolt Biter™ Low-Profile Wrench Insert System
Total Set Piece Count 5 Inserts Plus Storage Case
Minimum Fastener Size Range 0.250 Inches (1/4 in. Minimum Capacity)
Maximum Fastener Size Range 0.500 Inches (1/2 in. Maximum Capacity)
Tool Drive Interface Type Hex Base / Wrench Insert Configuration
Magnetic Retention Feature Yes (Built-In Wrench Retaining Magnet)
Structural Metallurgy Chrome-Molybdenum (Cr-Mo) Alloy Steel
Protective Surface Finish Corrosion-Resistant Manganese Phosphate
Storage Container Type Durable Injection Molded Case
Manufacturer Warranty Full Lifetime Manufacturer Warranty
Suitable for material type Hardened Steel Bolts, Stripped Screws, & Rounded Nuts

Pro-Tip: Ensure the magnetic base of the Bolt Biter insert snaps flush against the bottom of your wrench jaw before applying torque to prevent shifting and maintain maximum pulling power.