Robust Bit-Check 30 Wood1. Bit-Check 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. Including universal holder with ring magnet that even holds heavy bolts securely in place and Rapidaptor, which makes it possible to insert bits without handling the socket. For mounting in a screwdriver or the chuck of an a electronically controlled drill. Multicomponent Bit-Check, can be set up for permanent and safe bit management.