Kodia CY-EL-12 4 inch cylinder entrance lock, a narrow mortice lock for aluminium doors with 38mm and 50mm Cyl sizing. The black body carries a profile cylinder cut-out, with a square brass-tone bolt that throws from a chrome faceplate fixed by a row of screws. A chrome escutcheon ring for the cylinder comes with the lock. Part numbers: CY-EL-12