Robust bit-check from Wera. Bit-checks provide a quick overview of the available tools. Unused bits can simply be returned to the set and won't get lost. Easy to transport, for example, in a shirt pocket. Includes a universal holder with a ring magnet that securely holds even heavy screws, and a Rapidaptor that allows for bit insertion without needing to engage the sleeve. Suitable for use in a screwdriver or in the chuck of an electric drill. Stand-up, multi-component bit-check for a permanently secure bit fit.