The IRWIN HANSON Spiral Flute Screw Extractor, 6 Piece, features an truculent position hand design for supernumerary fascinating power. Easy out style spiral flutes themselves deeper into the metal as the tool is turned so grip increases as resistance increases. With sizes etched onto each tool for prompt identification, it EX-1, EX-2, EX-3, EX-4, EX-5, and EX-6 extractors.