Irwin POWER GRIP 7-Piece Screw and Bolt Extractor Set

7-piece power bolt grip set. Grips both metric and SAE - Universal Lobular Design fits both sizes. Black oxide finish with white markings - prevents rust and easy-to-read markings. Maximum gripping power - reverse spiral flutes are designed to bite down. Removes rounded off, painted over, damaged, and rusted over nuts and bolts. Shear-resistant shank - high-carbon steel shank is larger than most fastener shanks and resists torsional shear. 1/4' hex shank for use with cordless drills, impact drivers, corded drills, and nut runners. Power groove allows for use with quick change adapters. Includes sizes: 3/16', 1/4', 5/16', 3/8', 10mm, 7/16', 1/2', and plastic case.