Robust Bit-Check by Wera. Bit-Checks provide a quick overview of the tools available. Bits not needed are simply reinserted into the set and do not get lost. Simple transportation e.g. in the shirt pocket. Extra-hard bits. BiTorsion bits with an elastic Torsion zone – where kinetic energy is diverted from peak loads – and softer BiTorsion zone to prevent the bit tip from twisting under peak loads. This greatly extends the product service life. 1/4" hexagon, suitable for holders as per DIN ISO 1173-F 6.3. The profile and size of the bits are easy to recognise thanks to the Wera "Take it easy" Tool Finder with its colour coding and clearly visible imprint. Multi-component Bit-Check that can be positioned upright for permanently secure bit storage.