Buyers Products Company

Heavy-duty 50 Amp rotary switch controls forward and reverse motion of a 12-volt motor without requiring a relay
Commonly used on 12-volt truck and trailer tarp systems
Momentary on/off/momentary on lever type actuator
(4) screw terminals with silver laminated contacts. Includes screws and washers
Zinc plated steel case 
M12 x 1.0 mounting threads
Aluminum name plate "UNWIND/WIND" included