The Tow Tuff TMD-35ETD8 Electric Trailer Dolly is an excellent way to move utility, boat, or cargo trailers. The unique, 3rd wheel design stabilizes the load to move trailers and equipment safely. This trailer dolly is powered by two 24 Volt sealed 7Ah batteries and has variable speeds in forward and reverse. Dolly can travel up to 1.5 MPH. You can use this electric trailer dolly with a wide variety of trailers with an adjustable ball height from 22 inches to 28.35 inches. This dolly features two 13-inch tires and one 8-inch swivel caster and is perfect for all kinds of terrains. Heavy-duty construction gives you a long-lasting product. Designed with a step for added foot leverage. This dolly works with a 2-inch coupler. The capacity of 3500 pounds with a tongue capacity of 600 pounds allows you to move a wide variety of trailers. Move your utility, boat, or cargo trailers with ease with this heavy-duty Tow Tuff TMD-35ETD8 Electric Trailer Dolly. Material: Metal.