The DorGard II provides unsurpassed protection for lock cylinders on narrow stile aluminum doors. Using cast steel components, it creates a “vault” around the cylinder. The face plate is cast stainless steel, protecting against all common drilling equipment. The plug protector is made of case hardened steel. It rotates freely in the face plate, protecting against forcible removal of the plug. The DG2 is affixed with hardened steel bolts through the door. The unique construction provides easy installation, and easy access (without removing the door guard) for servicing the cylinder. DorGard II can be used with any cylinders from 15/16″ to 1-3/8″ (2.38 to 3.50cm) in length.