Wiha Insulated Inch Nut Drivers Set 11 pc Set includes 5/32, 3/16, 7/32, 1/4, 5/16, 11/32, 3/8, 7/16, 1/2, 9/16, 5/8 Insulation according to ASTM F-1505-01. New VDE specification 0682/part 201 and IEC 900, NFPA70E, up to 1000 Volt. Individually Tested. Blade CVM steel, hardened. Insulation molded directly onto blade. Deep drawn 1 inches.socket. Wiha-SoftFinish handle, multi-component. Inch sizes.