Hanson 53217 Extractor 5/8" Multi Spline, for Tap Die Extraction Screw extractor set is designed to remove broken studs, bolts, socket screws and fittings Screw extractors are ideal for high-torque applications Each IRWIN screw extractor has an aggressive left-hand spiral design for extra gripping power 5/8-inch recommended drill bit diameter 3/4" hex head and 1-3/16" bolt diameter