Unilocking / Household item

This product is Window Locks which close the window easily and comfortably. The existing window locks have only function which tighten windows. So, the locks encumber edge of window when the window is closed.
This window locks improve the inconvenience when you lock the window as above.
Since the loop of window locks is designed as curved form, Locks doesn't interrupt the edge of window when the window is closed. When the loop of window locks is fully turned, the windows are completely locked.