B Rated Burglary Construction1/2" Solid Steel DoorTotal Door Thickness: 3"(4) 1 1/4" Massive Chrome Plated Solid Steel Live Locking Bolts, S&G Electronic Lock(1) Drill Resistant Hard Plate(1) Active Spring Loaded Re-locker(1) Full Length Locking Bar to Deter Attacks on the Hinges(1) Adjustable, Removable Shelf(4) Pre-Drilled Anchor Holes