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

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.