The Wera Bit-Check 10 Universal 3 SB Allround Torsion bit set with Rapidaptor is designed for compact and organised tool storage. Torsion (TZ) bits are designed to prevent premature wear for improved service life. Extra-Tough bits are suited to hard metal jointing, threaded fasteners and general use. The RAPIDAPTOR Universal bit holder with quick-release chuck offers press-in auto-lock and rapid one-handed bit changes for insert and power bits. The holder spin sleeve allows the steadying of the screwdriving. Wera Bit-Checks feature a compact design to safely store bits in a case that provides fast and easy tool selection. It is so slim, it can fit into your pocket. Sorted by drive and size, tools are easy to locate and return to proper position, making missing products easy to identify. Ideal for use with drill/drivers; for impact machines use IMPAKTOR.