Quote Originally Posted by Disco Dan View Post
What makes a safe:

Bulletproof?
Hacksaw proof?
Crowbar proof?
etc etc
Being impossible to find. Seriously, bury it in the floor in a closet or somat. Less exposed to fire there also, particularly in a concrete pad. Anything can be broken given the right tools and time but there's a reasonable limit to what even a pro will bother to attempt in a domestic safe. If it's more than 6 or 8mm plate it's going to take a gas set and they'll probably walk away, if it can't be lifted they won't take it with them.

As a matter of interest they used to construct high-end safes with multiple sheets of rusty steel laminated into the case. This makes it difficult for both oxy torches and thermal lances to penetrate. They also had layers of silicon carbide or similar to discourage edge cutting tools. I think the age of the professional safe cracker is long gone though, the technology eventually beat them.