The Wera BTH 25mm BiTorsion Extra-Hard Pozi PZ2 Bits supplied in a Bit-Box, with a slide switch allows simple and gradual removal and reinsertion of the bits. The transparent reverse side provides an easy contents check. Designed for use with timber screws in drills/drivers. Thanks to a best-possible utilisation of the material properties and optimally designed geometry, BiTorsion bits will dramatically extend bit service life. Incorporates Wera's Toolfinder system, based on coloured band coding for screw profiles (black = Pozidriv; red = Phillips etc.) with clear size markings.