How about the lotus leaf of the anti theft door on the outside

Hello friends! Outside, only the door is locked with a key, and the anti-lock can only be done at home. However, the current lock cylinders are relatively advanced, and the problem should not be big if you don't lock back.

The hinge of the anti-theft door is normal outside The purchase of anti-theft mainly depends on its anti-theft level, the steel thickness of the door is different from the technical opening time of the lock. Anti-theft grade stamping on hinged side door frames. >>>More

Under normal circumstances, the general security door can be opened as long as there is a key inside or outside. >>>More

The security door is fixed to the wall with expansion screws, and the screws are all on the door frame. If the door can't be opened, use a tool to knock off the wall around the door by no more than 10 cm, and the door will naturally fall.

Now there is no such lock cylinder, generally both sides inside and outside are all kinds of key locks or open, unless the inside can be locked with a safe, the outside with a key can not be opened, if you want the outside to lock, the inside can not be opened, you can talk about the lock reverse installation, the inside as the outside installation, the outside with insurance, the effect is the same, but the lock cylinder is required to be equal distance on both sides, you can reverse the installation.