Wera Bit-Check 6 PZ Diamond 1, is designed for compact & organized tool storage. Utilising a unique combination of special material, hardening & precision manufacture, BI-TORSION bits are designed to prevent premature wear & dramatically extend service life. The patented Torsion zone absorbs peak stress loads that normally destroy bits. Bi Torsion DIAMOND COATED (BDC) bits ensure safe working, especially driving screws into delicate materials or high-quality surfaces, preventing slip. in addition, where screws are driven into resistant materials such as hard woods, concrete screws & ABS plastics DIAMOND COATED bits “bite” into the fastener ensuring a secure fit & reducing cam-out effect, extending the life of the tool & ensuring screws are fully driven home. Wera Bit-Checks feature a compact design to safely store bits & bit holders in a case that provides fast & easy tool selection. So slim it can fit into your pocket. Drive & size are colour coded for easy selection of the right bit.