UNISAN Gator Refuse Container Utility Dolly. Four-wheeled dolly for drum-style waste containers. Free-wheeling mobility. Easy, twist-on/twist-offUltra-stable design.Streamline waste collection with this free-wheeling dolly. Easy, twist-on/twist-off attachment simplifies setup. Ultra-stable design minimizes the potential for messy tip-overs. Includes one dolly.