Bought one at Harbor freight for about $7 (US). No good place to put it on the boat receiver securely (flat and very close to the front of the trailer). It is really nice to put it on the back of the trailer and on the front of the trailer to line up the trailer when backing into the water. If your trailer and hitch have a suitable place to put it then it might work for hooking up the trailer. Harbor Freight also has a "V" shaped thingy that goes under your hitch ball to line up the trailer for you. With both of these devices, the hitch and ball must be close to the right height. Not as easy as it sounds if you are on any sort of slope.
