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 screwsDuctile and tough for hard materialsHex-Plus allows socket head screws to live longer1/4" hexagon drive (Wera connecting series 4)Suitable for AEG ARO Atlas-Copco Biax Black & Decker Bosch Buckeye Tools etc.