Narrow width, Deadlocking # 85, Brass| 40mm Backset| Standard and narrow options| Bolt can be held withdrawn with snib| Nightlatch supplied with 5 pin cylinders: Brass latch with brass plated cylinder, Silver and Grey latches with satin chrome cylinder| Standard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