Wheel your trailers around easily without needing to hook up to a vehicle with the Trailer Dolly from Extreme Max Products. Perfect for boat trailers, snowmobile trailers, cargo trailers and more, the dolly uses its all-steel frame construction to support any trailer with up to a 600 lb. tongue weight. Underneath, the 10 ft. x 3.5 ft. pneumatic tires make moving the load easy, even on rougher surfaces. On top, the dolly features a 1-7/8 ft. hitch ball that will fit most trailer couplers. The whole unit is powder coated to resist rust and corrosion and built to last many seasons of trailer moving. Specifications Weight capacity: 600 lb. tongue weight Note: For use on hard, dry, level surfaces. Do not surpass 600 lb. tongue weight capacity. Material: Stainless Steel.