Bit set. Bit-Check 7 TX provides a quick overview of which tools are available for use. The bits that are not used are simply placed back in the holder and are never lost. Easy to carry, e.g. in a shirt pocket. Includes universal holder for bits with a 1/4" hexagonal drive according to DIN ISO 1173-C 6.3. With quick release attachment for fast bit changes. With tempered TORX BO bits for universal use.