replying to TomR, CampingMagic wrote:
The Master Lock 30 Hitch Lock is held in place by a large set screw that is
tightened with a screwdriver through the hole underneath the lock. The key
allows the alloy barrel to be rotated to block screwdriver access to this hole.
If the key operates the lock loosen the set screw with a screwdriver.
If the key is missing or the lock does not work, drill upwards through hole
the get access with a screwdriver and loosen the set screw. Good Luck.

--
for full context, visit https://www.homeownershub.com/mainte...ck-697443-.htm