WD-40, 3-IN-ONE, 10 oz. Flammable Lubricating trailer hitch, pin and clips, ball and receiver hitch. Preventing rust and corrosion for up to one year. Lubricating other moving parts, such as bearings, rollers, gears, cables and chain. Reduces friction and wear in trailer hitch systems. Protects and lubricates trailer hitch balls. The 3-IN-ONE Trailer Hitch unique gel formulation ensures a thick layer of lubricant will stay where you spray, instead of dripping off and creating a mess