The Maxxtow Trailer Dolly makes an easy job of maneuver trailers weighing up to 600 pounds. Great for boat trailers, utility trailers, jet ski trailers and more. Simply load the trailer onto the 1-7/8 inch hitch ball that can accommodate most trailers. Heavy duty 12 inch pneumatic tires allow the dolly to be rolled around with the trailer. Assembly required. Features heavy duty steel construction with a black powder coat finish.