Irwin Screw Extractor, Spiral Flute, 6-Piece (53545) Product Description The IRWIN HANSON Spiral Flute Screw Extractor Set, 6 Piece, features an aggressive left hand design for extra gripping power. Easy out style spiral flutes embed themselves deeper into the metal as the tool is turned so grip increases as resistance increases. With sizes etched onto each tool for quick identification, it includes EX-1, EX-2, EX-3, EX-4, EX-5, and EX-6 extractors. From the Manufacturer The Irwin Tools 53545- 6 Pc. Set (1-6), Spiral Screw Extractor contains multiple sizes for the removal of broken studs, bolts, socket screws and fittings. The aggressive left hand spiral is designed for extra gripping power. Designed to remove broken studs, bolts, socket screws, and fittings Aggressive left hand spiral design for extra gripping power Easy out style spiral flutes embed themselves to increase grip as resistance increases Extractor size and recommended drill bit size are etched on each tool Set includes spiral flute screw extractors sizes EX-1, EX-2, EX-3, EX-4, EX-5, and EX-6