How to remove a round tumbler lock on the basement door?

SoCalDesertRider wrote:
I had a tool box I got locked out of when the lock/latch mechanism seized up. It used the same lock cylinder as RV compartment doors use.

I pounded a flat tipped hex chisel into the key opening, then put a crescent wrench on the chisel and turned it until the lock broke.

Drilling is a waste of time. Do it the way the thieves do it, the easy way.