Wera 05060045001 855/4 Z 1/4'' Hex Pozidriv Power Drive Bits are high quality bits for pozidriv screws and are ductile and tough for hard materials. Wera 855/4 Z 1/4'' Hex Pozidriv ® Power Drive Bits are designed with a 1/4'' hex drive and are suitable for holders as per DIN ISO 1173-F 6.3.