The Wera Bit-Check 12 Diamond 1 with Rapidaptor is designed for compact and organised tool storage Utilising a unique combination of special material hardening and precision manufacture BiTorsion bits are designed to prevent premature wear and dramatically extend service life The patented Torsion zone absorbs peak stress loads that normally destroy bits The 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 BiTorsion Diamond Coated BDC bits ensure safe working especially driving screws into delicate materials or high-quality surfaces preventing slipping Additionally where screws are driven into resistant materials such as hard woods concrete screws and ABS plastics diamond coated bits bite into the fastener ensuring a secure fit and reducing cam-out effect This extends the life of the tool and ensures screws are fully driven home Wera Bit-Checks feature a compact design to safely store bits and bit holders in a case that provides fast and easy tool selection It is so slim that it can fit into your pocket Drive and size are colour coded for easy selection of the right bit This 12 piece set contains the following 1 x 14in x 50mm Rapidaptor Universal bit holder 3 x BiTorsion 25mm BDC Phillips bits PH1 PH2 x2 3 x BiTorsion 25mm BDC Pozidriv bits PZ1 PZ2 x2 5 x BiTorsion 25mm BDC TORX® bits TX10 TX15 TX20 TX25 TX30 Suitable for use with drilldrivers; for impact machines use IMPAKTOR