These Mini Battery Switches wit h Push to Reset Breaker feature a small footprint which makes them ideal for close quarters. The 422753-1 is rated at 30A continuous and 150A cranking amps and the 422757-1 is rated at 70A continuous and 300A cranking amps. Installation is as easy as drilling a 1-1/2 hole, inserting the socket body, installing the fasteners and connecting the wires. Constructed of machined brass and injection molded nylon.