This Equal-i-zer Weight Distribution Hitch Shank is for use with a No Shank Equal-i-zer weight distribution system. It fits 2-1/2" trailer hitch receivers. Specifications•Receiver Size: 2-1/2 Inch•Shank Length: 12 Inch•Shank Rise: 10 Inch•Shank Drop: 6 Inch•Number Mounting Holes: 6 10 Inch Rise x 6 Inch Drop 6 Mounting Holes 16000 Pound Gross Trailer Weight Max | Weight Distribution Hitch Shank for 2.5" Receiver, 6" Drop