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If it is an anti-lock inside, it will definitely not work, if there is no anti-lock, there is a spare key can also be opened, of course, all the problems of the locksmith can be solved, 110 can also be, it seems to cost 100 yuan for the police.
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If you screw the anti-theft one inside, you won't be able to open it.
1. Answer: 1) You can ask a professional lock picker to help open the door, because the anti-theft door is very strong. >>>More
Generally speaking, they cannot be opened, because their emptiness is a connected hole, and if there is a key inside, the outside key cannot be inserted (not all of them).
Just change the lock cylinder.
Inside there is a separate system of safety, independent of the cylinder control outside. Can only be counter-locked in the room. It is impossible to lock it even if there is a key from the outside.
The security door has two sets of keys AB, and the A key is used by the decoration personnel. The B key is for the head of the household. Door lock manufacturers have developed a key specially prepared for the pre-decoration of residents. >>>More