Feature●Features BiTorsion design for TORX head screws, TX 10 x 1/4" drive●For hexagon bit holders and direct drives●For Fein, Bosch, Holz-Her, Metabo, and Lecurex hexagon drives●Wera Bits for hard materials (e.g. metal sheets or structures) prevent premature breakages of the tip, created by the large amounts of peak torque generate to the screw and bit●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 BiTorsion tools have special tempered torsion zones that absorb peak loads when being used with power tools; preventing premature breakages, extending the service life of the tool.