Feature●Features Weras Extrahard and torsion form design, for Phillips screws, PH 1 x 1/4" drive●For hexagon bit holders and direct drives, 50mm blade●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 damageDescription 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. Made with the Torsion form for minimizing premature wear. Wera ? The Best Tools For The Job!