I recently "found" a 27 1/2 inch long rusty chunk of rail road rail in a "deserted" area and it works great!
It works better than the 4 1/2 inch by 6 inch by 6 1/2 inches block of steel I was using.
Now all I need is to get it cut on one end into a pointed "anvil" tip.
A few years ago I got a piece that was almost 7 feet long, but it was way too big to do anything with as I could not cut it down to size!
The thought was to cut it down and sell it off to pay for the cutting, but when I sold my truck, it went with it.