Something to keep in mind ... Officially NO, NONE, NADA as far as carry on tools go when leaving Cozumel. That includes really basic stuff stuff like an Allen wrench (hex key). They have (had) a cute little display case that showcases all the (otherwise legal) evil contriband they are looking for ...
Probably applies to Cancun as well. They tried to take my bit driver in Cancun, I pointed to my leg and said it was for it (and it was I carry the bit for it) and the TSA allowed it. The lady let me through. Only airport to ever question it around the world.