Speed Dealer Weatherproof Motorcycle Ignition Swich with Aluminum Nut Designed for marine use. Specs: Overall length 2", Diameter 1-1/2", Mounting hole 13/16" May also use with magneto. 5 terminals & 1 ground - Furnished with terminal hardware, mounting nut and 2 keys. Also has push button feature that can be used for aux power or horn.