[Heavy Duty]: ABS plastic housing, durable made for safety use, rear cover insulates terminals against any short of circuits, equipped with 4 sets of bolts. It is designed for 1 battery. [Easy to Operate] : On/Off 2 positions, 275 A continuous at DC 12V, 455 A intermittent at DC 12V, 1250 A momentary at DC 12V. [Widely Use]: High-quality battery isolation switches are very easy to install, widely used for car, marine boat, RV, camper, travel trailer, truck, ATV, UTV, battery banks and other devices. [Compatible]: used for DC 12-48 V system isolation and protection of electrical systems, can be independent or locked together with other switches. [Copper Terminal Stud Size]：2 x 10mm (3/8 inch), very easy to install, Tin plated copper studs and nuts ignition protected [Function]: Eliminate any power consumption of the battery when the vehicle or boat is not in use, and disconnect the battery safely.