The Ball’s Eye absolutely, positively aligns the center of the coupler with the center of the hitch ball. Simply back the tow vehicle until the “V” shaped guide bracket comes into contact with the hitch ball guide bar. Back within seven inches left to right and the guide bracket self aligns the center of the coupler. Lowering the tongue jack will drop the coupler accurately onto the hitch ball every time. Remove the pull pin and flip the guide bracket back to the towing position. Insert pull pin prior to towing. Two models available for tongue tube heights of four inches and five inches. The Ball’s Eye will not adapt to trailers using hydraulic surge actuators.