The Rhino Dolly is a heavy duty all terrain dolly, built with specialized steel and commercial grade poly resin and 8 heavy-duty urethane wheels for ease of movement. It is able to easily expand the surface of the dolly from 6" to 46" to accomodate small to large objects, along with designing the sides to separate from the dolly for moving oversized items. Collapsed size: 6"x16"x4.5" Expanded size: 46"x16"x4.5", It weighs 8 lbs and has a load rating of up to 1,500 lbs.