This is the easy way to align your truck and trailer with a fifth wheel, goose neck or a tag along hitch. Well show you how these units work starting on an actual truck and trailer. What this product does is that the base of it has a magnet installed on the bottom. One gets mounted onto the vehicle and the other onto your hitch. On the vehicle well install one just behind the hitch ball itself. The second one will be installed as far forward as possible. Next we raise them up to an equal height so we can see them from the inside of the truck. Once we have them even in line, we can simply back up our truck to our trailer and once they touch well know theyre aligned. At this point we have it pretty close, it may take a little practice at it, but once we get this close we can remove the device and hitch up our trailer. There you have it for part # 53410 Two Balls and Sticks, from Reese Tow Power, the Solo Hitch.