In terms of security, the American Security Vault Door VD8036BFQIS has a two-inch thick door constructed with 12 Gauge inner and 1/4" outer steel plates filled with DryLight fire insulation material in the middle. On the door lies a UL listed Group II lock with a spy-proof ring with the option to upgrade to an electronic lock. Behind the lock lies a tough hard plate and two relocking devices to ensure extra protection during an attack. After the correct combination is entered and you begin to turn the beautiful five-spoke handle, you'll start feeling the five 1.5" chrome-plated locking bolts retract. As you start pushing the door open, it will just glide on the commercial grade vault door hinges. On the inside of the door, you'll notice a Palusol expandable door seal that will assist in keeping both fire and smoke out.