What is this? (not a mopar part)

I worked busting tires for Sears when I was in tech school.
I saw a few that looked similar but weren’t worn as as bad
they wear like that from a lot of use.
If you look close the metal is kind of worn and shiny. This is from the impact of metal to metal on the gun part and the nut part from the vibration of the impact gun. It was probably just a piece of crap socket.