Hello, I found this at the flea this morning. Seller didn't know what to call it, others looked and still no definitive answer. I have a few guesses of my own, but I will wait until I hear from you guys/gals!!! It weighs in at 3 pounds, and the ball end looks like it has never been struck. The pins are actually nails, former owner put in a few coated nail replacements. I am guessing the original nails were hardened, as in a masonry nail, Thanks for looking, Lou