Wera bit check 7 pz bitorsion 1 with rapidaptor holder is designed for compact and organized tool storage utilising a unique combination of special material hardening and precision manufacture bi torsion bits are designed to prevent premature wear and dramatically extend service life the patented torsion zone absorbs peak stress loads that normally destroy bitsbitorsion extra hard bits are suited to general wood applications the holder with quick release chuck offers press in auto lo