This CURT replacement weight distribution shank is compatible with all CURT weight distribution hitches. It can be used to replace a damaged shank or to give your WD hitch greater flexibility in vertical adjustment. It features a standard 2" shank, multiple mounting options and a high-strength construction that is fully tested for tough jobs and harsh conditions. The 2" horizontal shank is designed to fit any 2" x 2" trailer hitch receiver. This makes it the perfect choice for most CURT class 3 hitches, class 4 hitches or Xtra Duty class 5 hitches. The shank features rounded edges for easier insertion into the receiver tube, and it has a 5/8" diameter hole to accept a hitch pin or hitch lock for secure mounting in the receiver. This particular weight distribution shank is 12" high by 18" long overall. Each hole in the vertical shank has a 3/4" diameter, and they are spaced 1-1/4" apart for a wide range of incremental adjustment of the WD head. With an overall height of 12", this WD shank provides a maximum rise of 10-1/4". The entire shank can also be flipped in the receiver tube to provide a maximum drop of 6". | Curt 2" Weight Distribution Shank, 6" Drop, 10-1/4" Rise