If you need to remove your boat from your trailer then this is how to do it. The front bow assembly comes with 2 main beams. These connect to support bars on either side which connect to U shaped acme rods which then fit into the front system base stands. We include a heavy duty reversible drop main beam to allow for deep or shallow V's. Rubber inserts keep your gel-coat from contacting steel which can cause scratches or gouging. 2 stern stands complete the system. These go under the boat and the system operates by screwing upwards equally on all 4 corners until the boat clears the trailer. Then roll it out and immediately place regular stands under the front of the boat to secure it.