This set of four probably came out of the Depression era—1930s. They are crude and rough. The oval back plate measures 2 1/8 inches across and 1 1/2 inches vertically. They are mounted to the drawer from the front with an attached one-inch bolt, which is then secured with a nut (included) on the back of the drawer. The oval ring pull which insets or nestles up next to the back plate is hinged at the top of the plate.