Wera vde insulated screwdrivers for square socket head screws wera 05004783001 this vde insulated screwdriver from wera is suitable for use with size 1 square socket head screws this driver has a 150mm zinc phosphated insulated blade and a 98mm multi component non roll kraftform handle wera 05004783001 vde insulated screwdriver for square socket head screw 150mm 1