Wera 10 piece 8855 9bth with ringmagnet rapidaptor bit check is designed for compact and organised tool storage bi torsion bth bits are designed to prevent premature wear and dramatically extend service life gold extra hard bits are designed for driving screws into normal constructiontimbers and materials the through hardening creates a much harder wearing bit the clever ringmagnet rapidaptor bit holder holds up to 8 inch 200 mm screws securely in place and acts like a third hand ideal