3 Piece, Double Ended Screw Extractor Insert Bit Set, Set Consists Of: DE-1 Screw Extractor, DE-2 Screw Extractor & DE-3 Screw Extractor, Impact Performance Series Grip, Built For Maximum Durability & Long Life With Impact Drivers, Ensures Both Ends Of Bit Lock Securely In Impact Drivers & Quick Change Chucks, Enabling Use Of Single Bit, Manufactured With M2 High Speed Steel & Extra Hardened For Maximum Durability & Long Life With Impact Drivers, Tip Of Drill End Is Designed To Start Fast With Minimal Walking & Tip Of Extractor End Is Serrated For Increased Torque, Manufactured With Heavy Duty, Cold Forged, High Grade Steel To Withstand High Torque Output.