Features and Benefits: * 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 extractors grip increases * Extractor size and recommended drill bit size are etched on each tool * Set includes plastic case Set includes spiral flute screw extractors in sizes: EX-1, EX-2, EX-3, EX-4, EX-5, EX-6; multi spline extractors in sizes: 1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2" and drill bits in sizes: 5/64", 7/64", 1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 19/64", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2".