Husky 34917 2 X 3/4 X 1-3/4 Chrome Solid Steel Trailer Hitch Ball All Husky trailer balls come with wrench flats inch for ease of installation Ball diameter: 2 inch; shank diameter: 3/4 inch Shank length: 1-3/4 inchinch; gross loads: 3,500 pounds Ball platform thickness: 3/8 inch  3/4 inch