Feature●Features Weras Extrahard design, for Phillips screws, PH 3 x 89mm blade x 1/4" drive●For hexagon bit holders and direct drives●For AEG, ARO, Atlas-Copco, Biax, Black & Decker, Bosch, Buckeye-Tools, Chicaco Pneumatic, Cleco, Deprag, Desoutter, Gardner-Denver, Hios (Ferra-Tools), Hitachi, Ingersoll-Rand, Iwema (Fuji Air Tools), Keller, Makita, Mall, Metabo, NPK-Air Tools, Pneutec, Rockwell, Rotor Tool, Skil Tool, Stanley, Thor Power-Tool, Tohnichi, Uryu (UPT-Weiler), Van Dorn, Virax, and Wolf hexagon drives●Wera Extra hard bits for soft materials (e.g. wood and general construction materials) are made from a special material that extends the tools service life and reduces the risk of material damage●Limited Lifetime Warranty, German EngineeredDescription Wera Bits are designed for the most demanding applications in trade and industry. They are designed to have the ability to transfer high torque loads, safe to use and extremely durable. The Extrahard bits are ideal for soft applications because they prevent premature breakages or wear. Wera ? The Best Tools For The Job!