A Yale doormaster lever operated latch and Deadbolt overnight lock with split spindle, 20mm faceplate and 45mm backset About this item The Yale Doormaster Overnight Lock is a standard security cost effective replacement that fits the majority of Timber and Composite doors Installation requirements: The lock requires Professional installation Door Type: Designed to replace almost all UK Timber and Composite door locks Dimensions: The overnight lock has a backset of 45mm, faceplate of 20mm Pack includes: 1 overnight lock with shortened faceplate and centre gearbox attached Fixtures and fittings included Euro profile lock case Latch & hookbolt 20mm Faceplate Split spindle Faceplate and strike to suit timber doors Specifications Brand - Yale Doormaster Backset - 45mm Barcode - 5011802416925 Case Height - 230mm Case Width - 60mm Centres - 92mm Centre Case - Latch & Deadbolt Cylinder Finish - Chrome Plated Faceplate Width - 20mm Select a Finish - Anthracite Grey Packaging - No Manufacturer Reference - YDM ONTMB D45DF Operation - C - One full turn of the key to lock and one full turn of the key then push down on the lever to unlock.