What happened when the screw was short when the door lock was installed?

The lock protector is not installed, or the lock core is installed backwards, or the lock core with the wrong size is replaced.

There are two screws at the top and bottom of the door closer, which can play an adjusting role. In addition, the hinge needs to be fixed with screws, so it can also play a fixed role. The door closer can compress the hydraulic oil when opening and closing the door through the hydraulic buffer, resulting in the force of closing the door. These two screws can adjust the speed of opening and closing the door at 1 and 2, so as to achieve better closing effect. This will be necessary if the installation time is short.