This Wera bit has been designed to perform in the most demanding applications in trade and industry. It has been designed to have the ability to transfer high torque loads, is safe to use and extremely durable. Greater elasticity of tough viscous bits prevents premature breakages of the tip of the tool. For TORX screws, TX 25 x 1/4" driver, hexagon bit holders and direct drives, with 25mm blade. For hard materials such as metal sheets and structures.