Designed for use with 6K, 10K, 12K, and 14K no shank models of the Original Equal-i-zer Sway Control Hitch. You can accommodate most combinations of tow vehicle and trailer with one of our adjustable shanks. Fits standard 2 or 2-1/2 receiver tubes. Hitch head mounting holes are spaced at 1 1/4 on center.