After buying the lock, you need to prepare the door and the jamb for its installation. To do this, you need to remove the old castle, if it was a patch lock, then it is enough to unscrew it from the door, but it will require the extraction of the mechanism. In the presence of the tool, all these operations can be performed quite easily and quickly. It must be remembered that the castle should enter the door tightly or fit to it. Nothing should hang out or swing. It is also necessary to check the operability of the lock at each stage of the installation.
