Power Caster - The original trailer mover! Maneuver your RV or boat trailer in limited space with this powerful, easy to use and safe electric trailer dolly. Power Caster handles all types of travel trailers (including fifth-wheels), boat trailers, ATV or jet ski trailers using a standard type hitch that has a crank-up jack. Designed for medium travel trailers 800 lb. tongue capacity 6,500 lb. laden weight capacity 1/2 horsepower electric motor 800 in.-lbs of torque @ 30 RPM 120 volts, 8.3 amps) Weight 77 lbs. (boxed shipping weight approx. 97 lbs.)