The combo brass and stainless locks always seem to rust up. The all brass models seem to last. I've switched to a key lock on the companion way because the combo jobs all seem to stick eventually and you have hard time finding a good new combo brass lock in the third world.
The breaking and entering thing is a real concern. Our companion way doors are louvered and I sure would not want anyone to kick them. A little tiny brass lock could be wrenched open pretty easy so that is going to far to make easy.
The best lock we have is the one for the dink engine
. It's one of those stainless steel
circular jobs with no shackle showing. It never seems to stop working.