The security door ABC key has two notches and what is the key

That is the key slot in the lock cylinder of the door lock is stuck, in this case, don't pull out the key, push the key gently, and then gently twist it to pull out, otherwise the harder the lock tooth card dies, you find a needle tube to inject a little cooking oil into it and then pull it out, so that you can also help you pull it out.

The anti-theft door has ABC3 kinds of keys, and the A key is used when decorating the decoration is completed and the C key is used to screw 360 degrees in the opposite direction The A key can not be used, and only the B key can open the door to the door key Divine Thought. (There is a description of the difficulty of the manuscript behind the key when handing over the room). >>>More

At present, according to the "Mechanical Anti-theft Lock" standard issued by the public security department in 2015, the anti-theft door is divided into three levels, A-level lock, B-level lock, and C-level lock, and the anti-theft performance from A-level to C-level is getting higher and higher. The differences between Class A, B, and C keys are as follows: >>>More

There are three types of locks in the security door market: Class A anti-theft lock (abbreviation: Class A lock) and Class B anti-theft lock (abbreviation: Class B lock). >>>More

The new doors are equipped with decoration keys, after the decoration of the new door, and then open with the other two keys, the decoration keys will not be used.