The Wera 05057664001 867/4 IMP DC Impaktor TORX® bit, size T40, features a 50mm length and a 1/4 inch hexagon drive. Engineered with Impaktor technology, this bit is specifically designed for use with impact drivers and other high-torque applications, offering an above-average service life even under extreme loads. The Impaktor holder and Impaktor bits work together to absorb peak loads, preventing premature wear and breakage. The diamond coating (DC) on the bit ensures a secure fit in the screw head, reducing cam-out forces and enhancing efficiency. This genuine Wera bit is ideal for professional use in demanding fastening tasks.