I wasn't clear on that either. I wasn't sure if there was some sort of a latch that would keep the snake in and the lock was only to keep people out. I just ordered the lock anyways to play it safe.
good on your part, I don't think that glass will keep a good size snake with escape on his mind in there. Just from watching m coastal in there it is pretty clear to me without the locks they would more than likely be on the loose.