Video: Safes, locks and other security measures of that nature? They're all eventually doomed because they're designed to open. It's just a matter of how long it takes. With the help of rare earth magnets, it takes just seconds. Here is Mr Locksmith demonstrating how a rare earth magnet can exploit the nickel piece in this Sentry Electronic Safe to get it open without any damage. The sock is actually just there so they can pull the magnet off the safe.