This is a metal horseshoe. It has 4 holes on one side and none on the other. The horseshoe is rusty. The edges are pointed, but rounded at the very tip. The horseshoe measures 5" (h) x 5" (w) x 0.5" (d).
Removed from above the passageway in the waiting room that leads to the stairs and kitchen. 05/16/2016 JAC