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The key is not right, Wufu door industry produces all kinds of anti-theft doors, fire doors, garage doors.
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The key is not equipped with specifications, not in place, go back to repair it. Tell the key master about the situation.
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Change the lock without a key, not safe!
Not necessarily the door is broken! Generally, there is a small pimple on the inside of the security door, and if you twist it, the key on the outside will not be opened. It's the last level that locks it. >>>More
Some of the keys are not very accurate, I had one before, and after opening the door, the original key could not be opened.
Try it a few more times with pencil powder on the key.
It depends on the situation, sometimes because the key is not fully inserted into the lock cylinder, if it is not opened after being fully inserted, find a lock picking company.
Not necessarily the door is broken! Generally, there is a small pimple on the inside of the security door, and if you twist it, the key on the outside will not be opened. It's the last level that locks it. >>>More