Tested to resist an extreme fire and burglary attacks. Passed a 2 Hour Fire at 1700 degrees external temp and 350 degree internal temp. Engineered with strong burglary resistance, heavy duty hinges, and uniquely designed 1 inch thick hinge side locking bar that extends from the top to the bottom of the door. This model is ranked between our Office Safe series and our Commercial FB series. Comes with a standard UL listed Group II-M anti-manipulated Dial lock or CE rated Electronic keypad. Also the Electronic Lock has a Detent feature for automatically locking once closed.