Wera Bit-Safe 61 Bi Torsion 1 comprehensive torsion bits & Rapidaptor holder set in pouch is designed for users on the move needing a broad selection of drive profiles with multiples of the same bit. 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. 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. EXTRA-TOUGH (BTZ) bits are suited to hard, METAL JOINTING, threaded fasteners & general use. Gold EXTRA HARD (BTH) bits are designed for driving screws into normal construction TIMBERS & materials. The holder with quick-release chuck offers press-in auto-lock & rapid one-handed bit changes for insert & power bits. The holder spin sleeve allows the steadying of the screwdriving. Wera Bit-Safes feature a compact design to safely store bits & bit holders in a handy structured fabric case; the tools are easily accessed. Drive & size are colour coded for easy selection of the right bit.