The Eaz-Lift TR3 600 lb. Kit is a weight distribution hitch with an 800 lb. maximum tongue weight rating that features adjustable sway control. By simply adjusting the clamp, you can decide how much sway control is exerted on the trailer. The TR3 will distribute the weight of your trailer across the axles of the tow vehicle and provide as much sway control as you choose. Or, turn the sway control completely off in dangerous or icy road conditions. Its streamlined design makes the hitch and the trailer move as one, while creating a sleek look. Includes a pre-installed 2 5/16-inch hitch ball. The Eaz-Lift TR3 is easy to install on top-mount or bottom-mount coupler style trailers.