The No 7964 surface bolt is typically used on the passive leaf of a double door at top and bottom. The bolt, with a French bulls-eye knob, provides a decorative element, suitable for a variety of periods and styles. It can be used in conjunction with the No 7951 cremone bolt or a mortise lock on the active leaf. It is available in 8″, 12″, 18″, and 24″ (shown) lengths. All Nanz plated and patinated finishes are available.