Mr Locksmith : Open Sentry Safe In Less Than 5 Seconds

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It's discouraging to learn that so many things can be opened with nothing more than a big magnet.

Apparently that's now how they work

from here

While the news article does explain the theory about how the technology is supposed to work, it sounds laughably like snake-oil to me. I wouldn't trust anything short of a metal cage to protect me from a shark, until such time other effective preventative measures become well known and common place.