Heavy duty 1 gauge copper coated aluminum cables have the capacity to start 10 cylinder engines High quality plastic coated steel clamps with copper coated aluminum jaws Color coded red and black for positive and negative terminals Rugged all weather construction Comes with heavy ...Heavy duty 1 gauge copper coated aluminum cables have the capacity to start 10 cylinder engines High quality plastic coated steel clamps with copper coated aluminum jaws Color coded red and black for positive and negative terminals Rugged all weather construction Comes with heavy duty storage case These super heavy duty 1 gauge jumper cables have high current capacity and are tough enough to be used for roadside assistance.