Available Keyed-Alike at a great price, the Willenhall M3 5 Lever Mortice Sash Lock comes in just one size of 50 mm with a 32mm backset. It is available in a brass & Satin Chrome Finish. Ideally suited when the door stile is too narrow to allow a standard 64 or 76 mm case size. Used mostly in French Doors Operation Deadbolt is locke..