On Sat, 22 Oct 2016 07:51:47 -0700 (PDT), wrote:

On Sunday, May 13, 2012 at 7:04:30 PM UTC-4, TomR wrote:
I bought an old used pickup truck a few months ago that has a trailer hitch
with a lock on it. I have the keys to the lock, but I can't get the lock to
open so I can remove the towbar/ball (or whatever that is called).

This is an old post (2012), but if someone has the same problem, cut
it off with an angle grinder.