Staples are used to attach NMC (non metallic cable) or BX (armored) cable to wooden studs. The RX Series is used for Romex® and the BX Series is used for Romex® and BX. The SEU staple is used for service entrance cable and is available in 100 pack. For electro galvanized specify G (i.e.; RXG50, BXG or SEU63G). Plastic Insulated staples are used for coaxial cable, bell wire, thermostat wire, telephone wire and Romex®.