The Ultra-Tow Adjustable Trailer Dolly with Caster provides an easy way to move your trailer into storage, through tight areas and in spaces where you can't drive it. Dolly can hold a total weight load of up to 800 lbs. to handle various trailers. Height adjusts from 15-3/8in.–24-3/8in. to accommodate many different sizes of trailers. Dolly features (2) 12in. flat-free tires and (1) 8in. swivel caster to provide smooth rolling and easy steering. Back caster also keeps the trailer load from putting too much weight on user. Constructed with a heavy-duty solid steel frame with a hammer tone powder-coat finish that resists corrosion. The 30in. wheelbase adds stability in turns. The 41-1/8in. handle provides additional leverage for easy trailer moving.