Insulated adapter blade. The blade adapts from 9 mm external hexagon to 1/4″ external square head. It can be used with the insulated Wera Kraftform Kompakt VDE bladeholding screwdrivers with 9 mm hexagonal blade mounting. It is suitable for insulated Wera 1/4″ sockets and 1/4″ bit sockets. Safe working at voltages up to 1,000 V is guaranteed as all tools are individually tested at 10,000 V as per IEC 60900.