In terms of security, the American Security Vault Door VD8030BF has a two-inch thick door constructed with a 1/2" steel plate combined with 1" DryLight insulation. 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 hardplate 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 ten 1.5" chrome-plated locking bolts retract. As you start pulling 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.