This elegant set is probably a front-door, entry set. The solid-brass knobs are,a small 2 1/2″ x 1 5/8″ size, with heavy necks. The space between the knobs,,after the plates have been put into place, is 2 inches. If more space is needed for,the door, the set screws can be adjusted to another hole on the spindle. , ,The back plates are an exact match. They measure 7 1/8″ long and 2 3/4″ at ,the widest point. The width is wide enough to cover most pre-drilled holes in the door. ,The key hole offset is 2 9/16″ from the bottom. Screws are included., ,We have only lightly cleaned this set. We do not believe in polishing wheels,,bead blasting, or chemical cover ups. We do not finish our hand-cleaning with ,lacquer or protective sprays. What you get is the pure item as it was originally made.