Yale Locks P117 Ventilation Window Lock White Finish Pack of 1This Yale P117 ventilation window lock is ideal for ground floor flats or windows that need to be opened for some ventilation but still keeping window secure from unwanted intruders as the window can be locked in a part openend fashion while still being secure. This lock is finished in white. Surface fixed lock that offers restricted opening and locking in a ventilation position. Will also restrict opening of window but allows ventilation. Pack of One