Our friends next door have a mosler fire safe to keep their documents protected. It had a very good electronic lock on it. They even keep it behind a locked door. They said that they wanted to keep their extremely valuable documents protected from a possible thief break-in. Our friends had a few thief break-ins before, so they are always cautious. They bought their Mosler fire safe a few years ago, and so far nobody has been able to crack it.