This is another one-off special project. They are some really big bolts, 1-1/2" diameter, by 6" long.
I bought a whole pallet of these, they were leftovers from a bridge construction. I had the idea to turn them into trophies/paperweights/awards. It's a cool gift for the mechanically inclined. They were covered in crud from years of storage. So I had them sandblasted with a very fine grit. They came out really nice. They may rust, so they will need to be sprayed with some clear-coat, paint, or similar. They are clean and ready to be used.
I also have a few matching castle nuts. They are $5
Original box included.