The IRWIN HANSON Hex Head Multi-Spline Screw Extractor Set, 25 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 25 hex head multispline extractors from 1/8″-78″ and carrying case.