What's your "Go To" for a hard head?

[deuce_roadster]

I have a special very THIN hole saw like tool that just fits over the stud that goes down and cuts the aluminum oxidation that is causing the problem. This tool is made to be used by hand I think. I have never had to use it but understand how it works. The metal is about the thickness of a razor blade. Later today I will post a picture of it in my MISC album.