The Deka EZ-Reach Battery Clamps are for use by Battery Chargers, Booster Cables and electrical equipment. PVC Coated and composed of Steel, these Heavy-Duty Clamps are rated for use for up to 400 Amps. These replacement clamps are designed for use with 4 Gauge, 6 Gauge, and 8 Gauge cable. Booster cable clamps are designed to grip securely to side terminal or battery post for maximum current carrying capacity. All booster cable clamps are color coded (Red Positive / Black Negative) for safety purposes, and easy identification.