The First Alert 2054F fire safe's anti-theft features include steel construction, heavy duty steel hinges, 2 solid steel bolts and mounting hardware for bolting to the floor.The fire safe's 4-number dial combination lock provides a high level of security. The combination lock is designed to be used in conjunction with the entry key: the entry key operates the safe's live bolt after the combination is entered into the dial lock. The entry key can be left in the keyhole using only the combination lock to secure the door, or it can be removed for an extra level of security. Two entry keys included. This First Alert .80 Cu. Ft. Fire Theft Combination Safe is UL classified fire safe tested to withstand an external temperature of 1700 degrees Fahrenheit for 1 hour while maintaining an internal temperature of less than 350 degrees.