Booster cable clamps are designed to grip securely to side terminal/post terminal batteries, and remote battery access terminals for maximum current carrying capacity. Each set of booster cable clamps are color coded (Red/Black) for both safety and visual appeal. The 500G PVC coated steel heavy-duty clamp is designed for use with 4, 6, and 8 gauge cable. This product has been identified for battery chargers, booster cables, and electrical equipment.