RADNOR® Battery Clamp Set (1 Red Clamp and 1 Black Clamp). RADNOR® Battery Clamps use a heavy-duty tension spring for a positive connection. The all steel jaws have excellent electrical conductivity yet have coor-coded vinyl insulation for safe handling. the hammer-on copper connection makes attaching your cable (sold seperately) easy and secure. Features Excellent electrical conductivity All steel jaws Hammer-on copper connection Heavy-duty tension spring for positive connection Vinyl insulated Color coded - Red and Black