Single-pole, triple-throw switch permits four connection modes: Battery One, Battery Two, two batteries in parallel, or both off. Rated for 230 amps continuous, 345 amps momentary. For 6-volt to 32-volt systems. Includes alternator field circuit disconnect to prevent surges. Selector has positive click positions. Bakelite housing with copper washers, brass terminals, and brass nuts. Install with #10 screws.