Easy Installation -- Equipped with 4 screws for your installation. The installation is simple. Open the back cover and connect the power cord, then use 4 screws to fix the four corners of the switch to the device. Safety Performance -- Use a 300A battery switch to isolate potentially destructive energy in the battery pack when the boat is not in use or in an emergency. An isolation cover with snap-on sections protects the rear contacts 3 Position Boat Battery Switch -- Strong compatibility. 3position 3stud dualcircuit battery switch, switches a single battery to a single load group. Ideal for marine, boat or RV applications. Part number: 6008 Red Copper Plated Silver Inner Core -- Good conductivity. Isolating ABS plastic shell and red copper plated silver inner core for maximum conductivity. Wide Applications -- Ignition proof, safe to install on gasoline powered boats, chassis design allows surface, front panel or rear panel mounting. Suitable for yachts, RVs, off-road vehicles, modified vehicles and ATV UTV, etc. Marine battery switch.