Switch-blades are 1000V VDE rated & Tested for safety assurance when working on live installations. All blades feature a hexagon drive combined with a precisely manufactured recess design, which when inserted into a switch-blade handle provides blade auto-lock and retention. The screwdriver head profiles are manufactured from durable and robust chrome vanadium, which is precisely machined and heat-treated to exact tolerances to provide extended product life. Conforms to IEC 60900, Manufacturer: Armeg Limited