Wera Series 1 851/4 RH Wood Power Bit, Phillips PH 2, 1/4" Drive 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. Features Wera's Extrahard design, for Phillips screws, PH 2 x 1/4" Drive For hexagon bit holders and direct drives, with 50mm blade 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 Manufacturer Part #: 05380161001