Rim cylinders are specially fitted to nightlatches on external doors. They are designed to be opened on the outside using a key and operated by a lever on the inside.
When locks become compromised – if you lose a key or you need to improve security – a rim cylinder lock can be interchanged between the nightlatch. 
 
At the Property Maintenance Store, we have a large range of items in stock ready for next day delivery. If you cannot find the item you are looking for, please call us now on 02072672656 and we'll be ready to help you and assist you with any queries you may have.