The GEARWRENCH Bolt Biter Wrench Inserts are designed with features to grip rounded-out, frozen, and damaged fasteners. The Bolt Biter design is bidirectional, seats quickly and safely on fasteners, and removes easily from fasteners after use. Offering the slimmest solution to removing damaged fasteners in tight and confined spaces, the Bolt Biter Wrench Inserts not only remove stuck fasteners using traditional wrenches technicians already have on hand, but also enable the reuse of specialty fasteners, saving users time to complete a job. The wrench inserts feature a magnet on the hex base to hold the insert in place on the wrench while removing or reusing fasteners.