Security Features:

•1" steel pry-resistant recessed door. 
•1/2" solid steel body.
• Additional spring loaded relocking device
  activated by a punching attack.
•Locks and relocks protected by a large  
  carburized hard plate. 
•A handle activated locking mechanism
  with three 1 inch chromed steel locking
  bolts (five bolts in model 4024).
•Solid steel full length dead bar prevents
  door removal if hinges are removed 
  during a forced entry attempt.
  protects locking area.
•Adjustable ball bearing hinges.
•Body reinforcing frame gives the
  appearance of 1" thick walls to
  discourage attack. 
•UL listed high security digital lock.