T9 25MM Wera 855/4 Z  & 867/1 Z TORX® BO bits with bore hole Maker : Wera Model No. : 867/1 Z TORX & 855/4 Z  High quality bits for recessed TORX® screws. The bore hole in the bit and the pin in the TORX® BO screw prevent any unauthorised loosening – secure fastening. Tough viscous for universal use. 1/4" hexagon, suitable for holders as per DIN ISO 1173-D 6.3. For recessed TORX® screws with securing pin Ductile and tough for hard materials TORX® bit with bore hole on the output side 1/4" hexagon drive (Wera connecting series 1) Suitable for Bosch, Fein, Holz-Her, Lecreux, Metabo 867/1 Z TORX® BO bits with bore hole Standards DIN 3126-C6.3, ISO 1173