HN11119 Features: -Designed to remove broken studs, bolts, socket screws and fittings.-Aggressive left hand spiral design for extra gripping power.-Spiral flutes are designed to embed themselves deeper into the metal as you turn the tool, so as the fastener resistance increases, the extractor"s grip increases.-Extractor size and recommended frill bit size are etched on each tool.-10 Piece Spiral Extractor and Drill Bit Set in Metal Index. Includes: -Set includes metal index case Set includes spiral flute screw extractors in sizes: Ex-1, Ex-2, Ex-3, Ex-4, Ex-5, and drill bits in sizes: 5/64", 7/64", 5/32", 1/4" and 19/64".. Warranty: -Lifetime warranty does not cover abuse.