Off(pushed fully in)-Ign/Acc-Ign/Start. Spring return to Ign/Acc. Ratings at 12V DC: 10A Accessory, 5A Ignition, 5A start. Four screw terminals. Plated steel case. 3/8"-24 mounting stem fits panels up to 3/16" (4.8mm). Includes hex nut and washer for mounting. Black plastic screw-on knob.