Here is an example of a mortise lock installation on a residential door.
Mortise locks are a very common type of locks, usually on an older residential door and almost on every business door.
These type of locks are fairly cheap and provide good and basic security.
In addition, you can upgrade the security of your home or business by buying a high-security mortise lock, which can also be installed on every door.
Finally, they can also be installed with a lever handle or even push bar setup if required.
below, you can see the installation process before and after.