Features and Benefits: Professional quality heavy duty clamps for all booster cableslFully insulated safety clamps wont spark if tapped togetherlSolid copper jawsl500 AMPlBonded plastisol vinyl insulationlFor use with cable 3 4 6 GAlHas flexi springs. Associated Equipment 500-amp Clamp Kit includes professional-quality replacement clamps for 3- 4- and 6-gauge booster cables. This made-in-the-USA kit also includes replacement jaws made of copper with bonded plastisol vinyl insulation as well as Associated s innovative Flexi-Spring cable guards for long cable life at the point it bends most. Professional quality heavy duty clamps for all booster cables Fully insulated safety clamps won t spark if tapped together Clamp Kit 500A.