How is this Knocker installed? Must you put two screw through the entire door?A. The Brass Accents A07-K5520 does need to be screwed through the entire door. But to get an idea of what the other side looks like, the screws will fit inside a cup washer that gives is a smoother look so the screw heads don't stick off the door but only slightly. You can paint them to match your door otherwise they will show a satiny brass color.
What is the spacing length between screw holes?A. The spacing length between the screw holes is 4 1/2".