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Wera 840/4 Z Bits - 3 x 89mm. 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.For socket head screws
Ductile and tough for hard materials
Hex-Plus allows socket head screws to live longer
1/4" hexagon drive (Wera connecting series 4)
Suitable for AEG ARO Atlas-Copco Biax Black & Decker Bosch Buckeye Tools etc.