855/4 BTH bits Plumbers tools hardening and precision manufacture

hardening and precision manufacture

To change the bit

3x 851/4 TZ Phillips: (1x) PH 1x50

4 mm HIOS drive

ACR) to prevent any slipping out of the screw head

855/4 BTH bits Plumbers tools hardening and precision manufacture855 4 BTH bits Wera 855 4 BTH BiTorsion Extra Hard Long Service Life bit, for Pozidriv screws. Often bits break as they can't handle the peak stress put upon them, the tip breaks and damage is also often caused to the screw head. Wera designed the BiTorsion system to prevent premature wear and significantly increase the service life of the bit. The system uses a two stage cushioning process which allows smaller impacts to be absorbed by the bit