The King Tony 7 Pc. Insulated PH+SLT Head Screwdriver Set, No. 30617MR, features professional grade insulated screwdrivers that are lab tested and IEC approved. Every screwdriver is insulated to a 1000V capacity. The shanks are made from high quality SNCM-Vanadium alloy steel and have a chrome plated, black tipped magnetic end.