For Sale is this: Equal-i-zer 90-02-1000 Equalizer Hitch Head with a 2 5/16" ball. The head is rated at 1000 lbs. tongue weight and 10,000 Gross Vehicle Weight.  It takes the 10,000 bars. The square opening is 1 3/8 inches sq. You will also get the shank bolts. Thanks!