The GEARWRENCH Bolt Biter Screw Extractors are designed to grip stripped, frozen, and damaged screws. The extractors use patented tapered sides to sit easily and safely into damaged screws, providing powerful and consistent extraction. The bidirectional design makes it easy to remove fasteners from the extractor after use and allows for fasteners to be retightened. The extractors are made from high-strength steel, have a black oxide coating for corrosion resistance, and have high-visibility laser markings for easy size identification. They are compatible with fastener sizes ≤ 1/4” to 5/8” and M5 to M16. Available in a 4-pc set, No. 84787, or a 10-pc set, No. 84786 (includes five sizes of extraction drill bits for removal needs).