The Tow Tuff TMD-800C Trailer Dolly allows you to easily move boats, trailers, log splitters and other equipment. It's the perfect way to move your trailer into storage, and other tight areas that are hard to reach with your vehicle. This dolly featuers a a three wheel design. It contains two 12" flat free tires, and one 8" swivel caster. This allows for smooth rolling and easy steering. The back caster can also prevent the load of the trailer from falling back onto you. The 1 7/8" ball is adjustable from 15 3/8" to 24 3/8", allowing you to accomodate tailers of different hieghts and sizes. The 30" wheel base provides for greater stability and safety while turning and steering, and the 40" handle gives you additonal Leverage. This Tow Tuff Trailer Dolly is rated to handle trailers and equipment with a tongue weight up to 800 pounds.