@sun @Lyx @jeffcliff Keep in mind that resistance of safes is much decreased by battery-powered grinders. It works by melting, therefore no metal can resist it, no matter how hard. The only thing safes can offer anymore is being super thick. But that also makes them so heavy that normal houses cannot support them. It's a vault, not a safe. So I think the most important characteristic of a safe is a fire resistance. None of them offer much of burglar resistance.