Rim Cylinder is usually known as a Yale Lock. Some people like to call it a “simple” Yale lock, other just “the barrel”, but everyone is talking about the same common lock. But, unfortunately, it doesn’t have too many security features. Mostly, it performs the basic function of opening the door. Therefore, sometimes it can be picked, or easily drilled.
Standard Night-Latch (Usually no brand or a cheap version of Yale night-latch and doesn’t have any security features) . It just have the simple function of helping the door to stay close, attached to the frame. It’s connected with the barrel (1st article) and it’s positioned on the other side (interior) of the door.
Nothing new here, as the standard top lock kit is formed by the lock from the Yale “barrel” and the standard night latch, both mentioned previously. Basically, these two are interacting together and are a really common set installed on the doors in SE London. So, instead of just replacing only one part, you have the option to replace both parts as a kit under the same brand.
Usually, the five lever mortice deadlock is non-handed and comes usually with 2 keys. It is a type of door lock commonly fitted to timber doors. A specific point of this lock is that it can be locked and unlocked with a key from both the inside and the outside. With a bolt throw of 16mm, the deadbolts contain two hardened steel rollers to help resist attack.
This very common lock is similar with the “barrel” from mentioned above, so called the Yale lock. In terms of its functions and specifications, it is pretty limited and we can’t recommend it as a first option for a lock change.