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 86190 Bolt Biter 5 Piece SAE Wrench Insert Set for Damaged Fastener Removal Low Profile Extraction Tool Chrome Molybdenum Magnetic 1/4-1/2

In stock
SKU: 86190
$18.99

Description

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Unstoppable Grip in Tight Spaces: GEARWRENCH Bolt Biter™ 5-Piece SAE Wrench Insert Set

Don't let a rounded or frozen bolt bring your project to a halt. The GEARWRENCH 86190 Bolt Biter™ SAE Wrench Insert Set is the professional technician's secret weapon for removing heavily damaged fasteners in confined areas where standard extraction sockets simply cannot fit. Featuring a revolutionary bi-directional design, these inserts allow you to both loosen and tighten stripped hardware with ease. At 70% thinner than traditional extraction tools, these ultra-low-profile inserts transform your existing static, ratcheting, or open-end wrenches into high-performance extraction systems. Whether you are working in a cramped engine bay or on industrial machinery, these inserts provide the slimmest and most effective solution on the market.

Crafted from premium Chrome Molybdenum (Cr-Mo) alloy steel with a durable manganese phosphate finish, these inserts are built for industrial strength and long-term corrosion resistance. The innovative tapered entry allows the insert to seat quickly and securely onto fasteners that have lost significant material, while the integrated magnetic retention system ensures a rock-solid fit inside your wrench during high-torque applications. The hex base is compatible with 6-point, 12-point, and spline wrenches, providing unmatched versatility. With high-visibility laser-etched markings for rapid size identification and a convenient injection-molded storage case, this 5-piece set is an essential upgrade for any master mechanic’s toolkit.

Key Features

  • Ultra-Thin Profile: 70% thinner than standard extraction tools for superior access in confined workspaces.
  • Bi-Directional Extraction: Specialized internal geometry allows for both removing or tightening damaged fasteners.
  • Tapered Entry Design: Enables the insert to seat easily and securely on rounded-out or frozen hardware.
  • Magnetic Retention: Built-in magnetic system ensures a secure, non-slip fit inside the wrench during use.
  • Universal Compatibility: Hex base design works seamlessly with 6-point, 12-point, spline, or ratcheting wrenches.
  • Industrial Strength: Forged from Chrome Molybdenum (Cr-Mo) steel for maximum durability and high-torque capacity.
  • High Visibility: Laser-etched size markings provide quick identification in low-light environments.

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

Product Specifications

Brand GEARWRENCH
Model Number 86190
Set Piece Count 5 Pieces
Material Chrome-Molybdenum (Cr-Mo)
Finish Manganese Phosphate
Size Range Min 1/4 in
Size Range Max 1/2 in
Magnetic Yes
Drive Type Bi-Directional Extraction
Length Format Standard (Low Profile)
Warranty Full Lifetime Warranty

Pro-Tip: When using these inserts in extremely tight quarters, pair them with a ratcheting box-end wrench. The combination of the Bolt Biter's bi-directional grip and the ratcheting mechanism’s small swing arc allows you to remove damaged fasteners with minimal clearance that would otherwise require total disassembly of surrounding components.