840/4 Z bits, 0.9 x 50 mm The Tough Wera bits for hexagonal socket screws, for universal use. Hex-Plus offers lager contact surfaces in the screw head. The notch effect is reduced to a minimum and the destruction of the screw is nearly eliminated. 1/4" hexagonal, suitable for holders as per DIN ISO 1173-F 6.3. For socket head screws
Hex-Plus allows socket head screws to live longer
Ductile and tough for hard materials
1/4" hexagon drive (Wera connecting series 4) Application: Hexagon socket screws Drive 1/4" hexagon, suitable for DIN ISO 1173-F 6.3 bit holders Design Hex-Plus, tough, for universal use