Fullex door locks are available in many sizes. They have been used on doors made by St Helens Glass over the years. The secure By Design lock is usually identified by either a Secure By Design stamp or the older locks have a separate front faceplate that comes off to show the lock underneath. Some of the fuller locks from years ago were made with a 68mm handle centre. This I've very distinctive.
The more modern locks by fuller are the Fullex XL, you can just replace the cases on this lock and they are available on our site. If you need any help in choosing our lock please give us a call on 01204 652211