Auxiliary lock to lock window frame
Insert it into the window frame and lock the window by turning the key until it is tightened.
The contact part of the sash is made of rubber to prevent scratches.
Can be locked even when the window is slightly opened for ventilation.
Simple structure, easy to install and remove.
It is functional and sturdy, and can also be used to prevent crime and prevent your little one from opening the window and leaving it alone.