This replacement dual-ball with tow hook and hitch step is designed to fit the CURT adjustable channel mount #45904. It has two ball sizes to fit 2" or 2-5/16" trailer couplers, as well as a tow hook for straight-line pull applications and a non-skid stepping surface for easier truck bed access. NOTE: This package includes the dual ball only. Shank sold separately. This product is protected under U.S. Patent Numbers: 11,628,698 and 11,660,916.