Panel mount toggle switch. 1-pole, 2-throw on/off/on. Applicable for bilge pumps, speed selector, lights and navigation lights. Red pilot light visible in tip of toggle only. Fits panel up to 1/4 inch thick when not using the back-up nut provided, fits panels up to 3/16 inch thick when using the back-up nut. Requires a 1/2 inch mounting hole.