Wera 840/4 Z Tamper-proof Hex-Plus BO bits (05059640001)

Application: Hexagon socket screws with safety pin (BO = with bore hole) Drive: 1/4" hexagon, suitable for DIN ISO 1173-F 6.3 bit holders Design: Hex-Plus with bore hole, tough, for universal use

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. 1/4" 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. 1/4" hexagon, suitable for holders as per DIN ISO 1173-F 6.3.