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