The Gardner Bender gray plastic service entrance cable straps for #2 SER cable 5 pack accommodate larger sized electrical cable. These straps offer zinc-plated nails for rust- and corrosion protection.Insulated barrelSecures #2 SEU service entrance cableAssembled in USA with components from USA and ChinaDriving staples too firmly may damage insulation when used with non-metallic sheathed cableNot for use with portable cords