This TL-15 Amvault composite safe is built to protect with a massive 6" think door, and 3-1/2" thick body. This safe was able to withstand severe attacks that were performed by U.L. experts using sledgehammers, power saws, carbide disc cutters, drills, and without fail it was awarded the U.L. TL-15 label. This Amvault CE2518 composite safe has not only been upheld against the U.L. experts trying to break in, but it also passed the fire test to be certifited with the 350°F two hour fire rating.