Wera impaktor diamond hard bits for hex screws wera 05057604001 wera impaktor 40 x 25mm bits designed for use with hex screws impaktor technology ensures an above average service life even under extreme conditions thanks to utilisation of the material properties and optimally designed geometry particularly suitable for use with conventional impact drivers the rough diamond coating reduces the danger of any slipping out of the screw head wera 05057604001 impaktor diamond hard bit for hex