In my house, the anti lock key is inserted in the door, and the anti theft door is not easy to pick

Summary. Under normal circumstances, if you lock the security door with a key from the house, the key will not be removed and it will not be opened from the outside. This is because the locks on the security door are generally "one-way locks", that is, they can only be opened from the inside and cannot be opened from the outside. >>>More

You can find a lock picking company or adjust the position of the steel ball with the key to rematch the key. The lock cylinder of the anti-theft door has not been matched, so it should be cheaper than buying a lock.

Find a professional lockpicker, my family was in the same situation as you last time.

Contrary to the direction of your anti-lock outside, the anti-theft door anti-lock is an extra bolt, and when it is opened, you need to insert the key to restore the state of not re-locking, at this time, you can continue to screw the key to open the door or directly twist the door handle.

Pull it out, pour the pencil lead grinding powder or engine oil or vegetable oil, and reinsert the key to open it. Generally speaking, it is because the lock cylinder is rusty.