The Blue Ox TrackPro Weight Distribution Shank slides into your hitch receiver and provides an attachment point for the TrackPro Weight Distribution Hitch head assembly. The shank allows you to adjust the height of your TrackPro system and lets you level your trailer with your tow vehicle. The shank is available for both 2" and 2.5" receivers. It is offered in a variety of shank hole options including 7-hole, 9-hole, or 11-hole. It also works in the raised or dropped position. The shank is constructed from heavy-duty steel with a powder coat finish that resists corrosion and is made here in the USA!