Optional power switch for the Exhaust Brake that mounts on the manual transmission shift lever; For that old school trucker feel this switch is ideal for activating your exhaust brake of other accessories; Rocker style switch; For 5/8″ shift levers; Dodge 1989-1993 / 1999-up; Ford 1989-1993 / 1999-up; Chevy 1983-1993; Can be used for activating accessories such as light bars, air horns or whatever you need to activate an accessory within finger tip reach