This is a metal screw that is very rusted. The screw is round and has crcular lines at the top. There is a square bolt screwed on at the top. There is a washer that is loose between the bolt and a rectangular piece of metal that curves up on two sides. The bottom of the screw widens and becomes more angular at the top stopping the rectangular piece of metal from falling off. The screw measures 2.25" (h) x 3.5" (w) x 9" (l).