Standard Rim Cylinder. Keyed to Differ. A replacement rim cylinder that can be used with most UK rim nightlatches, enabling simple changing of the locks on your property. Cut-off tongue to the rear, allowing fitting on doors up to 65mm thick. Suitable for all major branded rim nightlatches. Provides a good degree of security. Comes with a 5 year mechanical guarantee and is Fire door rated. Suitable for domestic and commercial use.