Wera 840/4 Z Zeskant BO Bits met boring, 4 x 89 mm

Tough viscous Wera bits for hexagon socket screws for universal use. The Hex-Plus profile offers a greater contact surface in the head of the screw. The notching effect is therefore reduced to a minimum and damage to the screw head more or less eliminated. ¼ hexagon, suitable for holders as per DIN ISO 1173-F 6.3. Hexagon socket BO screws have a protruding pin in their drive profile. This prevents any unauthorised loosening since the normal hex tools cannot move these screws. ¼ hexagon, suitable for holders as per DIN ISO 1173-F 6.3.