An L-shaped member has a forwardly extending horizontal leg and an upwardly extending vertical leg. The horizontal leg has a forward end removably couplable with respect to a hitch of a vehicle. The vertical leg has an upper end. A roller assembly includes a U-shaped support. The U-shaped support has a horizontal central portion coupled to the upper end of the vertical leg. The U-shaped support has upwardly extending vertical end legs and a shaft rotatably supported by the end legs. The roller assembly includes primary rollers rotatably supported on the shaft. A spacer is provided between the primary rollers. A bottom of an object is positionable upon the primary rollers and pushed into position upon a roof of the vehicle.