Feature●Features BiTorsion design with diamond coating, for Pozidriv screws, in clamshell packaging, PZ 3 x 1/4" drive●In clamshell packaging●For Fein, Bosch, Holz-Her, Metabo, and Lecurex hexagon drives●Wera’s unique vacuum ice-hardened process gives the necessary hardness for industrial applications●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. Made from stainless steel minimizing extraneous rust.