At Hall’s Safe Co. we use a minimum 3/16-inch plate steel on all our safes. This provides additional protection from fire and theft. It also adds substantial weight to the body of the safe, affording you increased quality and security for your investment. Most safes on the market today are 10- to 12 gauge sheet metal. This neither meets our high standard of quality, nor does it adequately protect your safe from forced entry and/or fire.