Fill with sand, Rocks, or any other heavy substance up to 55 lbs, and you are ready to anchor your craft. Constructed of heavy duty waterproof nylon material.great for PWC's, inflatable boats, canoes, and other small water craft. Includes 10 feet of rope, float, heavy duty galvanized snap hook. Brass grommet hole on bottom for easy drain. Part # 4850-0001