The CURT MV round bar weight distribution hitch offers a smooth ride and level towing with its heavy-duty components and built-in lubrication system. Its grease zerk fittings, built directly into the head, allow for easy, continuous lubrication at the spring bar mounting location. This weight distribution hitch comes with a 2" x 2" shank and is rated for a towing capacity range of 5,000 to 6,000 lbs. GTW.