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1. The leakage point of the lock tongue is a lock body fault outside, and the relationship with the lock cylinder is not very large.
2. If the door is open and the key is easy to screw, it is not debugged when installing the lock cylinder.
It is recommended to use Yajie fingerprint lock, and today I installed a 5800 yuan one for customers, which is super luxurious, practical, convenient and safe.
It can't be opened, this is a one-way lock.
The lock cylinder must not be refueled, the door lock is very astringent and difficult to screw, you can use the following method: first cut a pencil with a knife, cut the pencil lead into powder, and then put these powdered pencil leads into the lock core (the pencil lead can play a lubricating role).
No, the handle of the security door is not so fragile, and you will not be broken in this way, unless it is your accumulated effort that may be broken, otherwise it will not.
Because of the long-term open door,.The friction between the key and the lock cylinder makes it more and more difficult to insert the key. The solution is to buy a special lubricating powder for the lock cylinder. And pencil lead gray is also fine.