A friend of mine found this 7 inch item with a 3.5 inch wide split end (the pen is 5 inches) on the banks of the Mississippi river near a ferry landing in La Crosse, Wisconsin. He thought it was a clam or oyster device, but it is too dull and heavy for that. It is forged steel with no markings. It is clearly handmade, flat shaft and square stock hook loop on one end. I thought it might be a hoof pick. Anyone have some ideas?