HOTSYSTEM DC12V HOTSYSTEM DC12V 30A Rocker Toggle Switch ON-OFF Control SPST LED Illuminated 3Pin Triangle Plug for Car Motorcycle Boat Marine Truck Trailer Auto and More (Yellow,5-Pack) Designed to connect and disconnect an electrical circuit at will. LED lamp will be lighted up when the switch is turned on. Fits into 7/16" holes with a maximum panel thickness of 1/8". And it comes with nut to prevent unwanted rotation. 3pins, 2 pole design (On/Off),3rd poles with LED to be connected to equipment positive pole. Suitable for almost any motorized vehicle such as car,truck,boat,atv,motorbike etc.Can also use these on water dispenser, running machine,electromobile,and other household appliances modification.