Here's another option. It's a ghetto one, but will only cost you a
few bucks and an allen key.... Get some JB weld, fill the hex key
hole with the jb weld and then stick the allen key in there. Wait
awhile and then crank the bolt loose. If you don't want to loose
the allen key, wrap it in plastic or maybe coat it with a non stick
cooking spray. I never said it was a classy solution......