Wera vde insulated screwdrivers for square socket head screws wera 05004781001 this vde insulated screwdriver from wera is suitable for use with size 2 square socket head screws this driver has a 100mm zinc phosphated insulated blade and a 105mm multi component non roll kraftform handle wera 05004781001 vde insulated screwdriver for square socket head screw 100mm 2