The 50 Amp Rotary Switch Kit from Buyers Products is a quick-install, easy to use switch to wind or unwind the tarp on your truck body or trailer. Its momentary ON-OFF-ON function is controlled by a lever-type "crow's foot" actuator that comes with an aluminum nameplate featuring UNWIND-WIND directions. The kit includes the 50A switch, mounting bracket, indicator light and 40A circuit breaker.