Normally off. S. P. S. T. 2 positions: off - momentary on. On with button depressed. Spring return to off. Silver contacts. Molded plastic insulator with a protective barrier between terminals. Mounting stem 5/8 in.-32 Dia, 1-3/8 in. L. Fits panels up through 1 in. thick. Includes 407-03 black moisture repellent rubber button cover. Cole Hersee has been a pioneer and leader in the development of heavy-duty electrical products for the vehicle industry and has earned a reputation for quality and value. Make sure the switch you're using is stamped with the official Cole Hersee insignia, and if it's a genuine 75910 it will have 'Complies with Australian mining regulations standards' etched into the housing.