Easy to install and use. Copper-plated silver termial. You can use it for long time. Does not generate sparks when inserted or removed. Fits 2 Gauge wire; 175m amps; Provides simple and convenient method for disconnecting power to a winch or other electrical device such as remote battery chargers, trailers, or for any purpose requiring a high-current, quick-disconnect connector. Complete set: 1 Pair (2 connector ends, 4 terminal pins ) 1 connector Dimension: 3x2x0.75(inch)