The Door Bull - Door Barricade Lock Out Security Device, Add Extra, High Security to Your Home - an Innovative Solution from The Law Enforcement Experts

the durable fits most inward opening doors without modification using the included hardware if your door has an unusually tight clearance a mortise may be required before installation first place the jam plate against the door frame at the desired height often about 18 inches above your doorknob make sure the curved cylinder side faces toward the wall with the flat side toward the door opening make a mark on your door frame through the elongated hole in the jam plate drill a 1 8 inch pilot hole on your mark then install a one inch screw to temporarily hold the jam plate on the door frame the screw should be tight enough so that the plate holds position but loose enough that you can slide the plate along the elongated hole close the door and slide the faceplate onto the jam plate slowly pull the faceplate in or out until a 1 16 inch gap separates the door and faceplate once position is s