Draw tire hitch receiver. Part # 41509. Fits 1991 - 1996 caprice wagon,Buick roadmaster wagon, and oldsmobile custom cruiser wagon. http://www.draw-tite.com/mobile/products/trailer-hitches/class-iii-iv-hd-receiver/class-iii-trailer-hitch/WfzaCtfZMf2jJgWHWM5lTuc2xVPwV6u3