M-282 & M-292 D.P.S.T. (Double Pole Single Throw) 2 position: Disconnects battery circuit & alternator or generator field circuit. Electrical contacts are arranged to interrupts field circuit before battery circuit is broken. Brass case with chrome plated lever. Mounting stem is 3/4” dia. x 1-13/32” long. Fits panels to 15/16” thick.