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. Includes universal holder with strong permanent magnet and quick-release chuck for the take-up of bits with ¼" hexagon head drive as per DIN ISO 1173-C 6.3. Can be inserted in the power screwdriver or for use in the chuck of the electric drill. Includes Torsion bits to combat premature wear. Tough viscous Wera bits for hexagonal head screws and universal use.