These small circular-patterned door knobs (only 2 inches) have the hour-glass necks which are rather uncommon. The solid brass knobs use a threaded,spindle and a set screw. The threads allow one to adjust the length of,the space between the knobs for the door., ,The brass-plated back plates measure 6 1/2″ x 2″ at the widest point.,The offset for the key hole is 2 inches from the bottom of the plate., ,We have only lightly cleaned this set. The original patina has not been,disturbed. Screws are included.