1, the lock edge refers to the direct distance between one side of the lock body and one side of the door leaf.

2. The center distance is the distance between the screw with the upper lock core in the middle of the lock body and one side of the door leaf. How to open the spherical door lock? 1. Just turn it out of the slot with a screwdriver. 2. Is there a gap between the door and the door frame? If there is, you can pick it up with something like iron. 3. Spherical door lock: The inner and outer handles (lock handles) are spherical, which are used for door locks installed on wooden doors, steel doors, aluminum alloy doors and plastic doors.