The No 7951 cremone bolt, traditionally used to secure French doors, dates back to the early part of the 20th century. A series of coves and stepped astragals comprise the strongly architectural body, guides and keepers. Cremones are designed to work with a particular application. Accordingly, rod length and keeper configuration will be determined during the specification process. Most Nanz levers and oval knobs can be used. All Nanz plated and patinated are available.