SS Panic Exit Door Push Bar Device Iron Alloy Fits 30″ to 36″ Commercial Grades Note：This product must be installed indoors. Only doors that are pushed outside can be installed.Anybody in the room can push out, and people outside come in with a key to open. No one can get in without a key. Note: Heavy Duty Commercial Rim Exit Device For 30″-36″ single Door, DOES NOT SUIT glass doors.