Versatile, it can also be used with hinges, side or top, or secured with simple turnbuttons only.Can also be used externally on tilt & turn windows and for inward opening hinged windows commonly seen on continental houses.
See also photos 2,3 & 4 above for the very easiest way to fit to some other types of window which might otherwise pose fitting challenges ( photos courtesy of the Flydor company ) showing the new wall fix sub-frame option, a complete oversize sub-frame for face fixing with a lift-off flyscreen to match.