Screw-Grip, Impact, DE-1, Double Ended Screw Extractor, Built For Maximum Durability & Long Life With Impact Drivers, DoubleLok Technology Ensures Both Ends Of Bit Lock Securely In Impact Drivers & Quick Change Chucks, Enabling Use Of A Single Bit To Remove Stripped, Damaged Or Rusted Screws & Small Bolts In 3 Easy Steps: Drill, Flip Bit & Extract, M2 High Speed Steel & Extra Hardened, Tip Of Drill End Is Designed To Start Fast With Minimal Walking, Tip Of Extractor End Is Serrated For Increased Torque To Remove Even The Toughest Bolts & Screws, Black Oxide Finish Resists Corrosion & Increases Life Of Extractor.