Standard width, Deadlocking # 89, Satin Chrome 60mm Backset Standard and narrow options Bolt can be held withdrawn with snib Nightlatch supplied with 5 pin cylinders: Brass latch with brass plated cylinder, Silver and Grey latches with satin chrome cylinder Standard section keyway Brass keys For doors 35mm-60mm thick Left and right hand opening doors Bolt and knob can be deadlocked from the outside by a full turn of the key