867/1 BTZ TORX® bits, TX 40 x 25 mmBiTorsion bits for TORX® socket screws with torsion zone into which kinetic energy is dissipated during peak loads. This significantly increases the product life. Best possible service life with the matching holder. Tough, for universal use. 1/4", hexagonal, suitable for holding tools as per DIN ISO 1173-D 6.3.