How to operate the security door can make the key of the decoration unusable

Now the high-end is the security door is a lock and B lock, the two can only choose one, decoration can be used A lock, once the decoration is finished, enable the B lock, the key of the A lock is automatically invalid, there is no way to open the security door.

Let the worker use the A key, after the decoration is completed, use the B key "waste A key", after the B key is lost or broken, use the C key to open the door "waste B key", and then change the lock core.

It depends on the kind of quality that is better, and the door is empty to meet the auspicious number of Luban rulers.

Now there is no such lock cylinder, generally both sides inside and outside are all kinds of key locks or open, unless the inside can be locked with a safe, the outside with a key can not be opened, if you want the outside to lock, the inside can not be opened, you can talk about the lock reverse installation, the inside as the outside installation, the outside with insurance, the effect is the same, but the lock cylinder is required to be equal distance on both sides, you can reverse the installation.

During the renovation period, the decoration key has been used, and the door key is not used first, and it is locked with tongue reeds. Once the decoration is completed and there is no need to be in the acceptance, you can discard the decoration key, use a new unopened key, and the decoration key will not open the door.