CURT 45644 Reversible Ball Mount Features two welded trailer balls on a hollow shank Allows for quick switching between trailer ball sizes and drop or rise Mounts on trailer hitches with a 2" x 2" receiver tube opening Fits 2" or 2 5/16" couplers and accepts up to 7,500 lbs. GTW 2" rise or 4" drop for precise trailer leveling