Tilt-turn windows are three windows in one: Depending on the handle position, they can be operated as a fixed window (handle in 6 o'clock position), in-swing casement window (handle in 9 o'clock position) and tilt-in-from-the top (hopper window; handle in 12 o'clock position). Tilt-turn windows are easy to reach from the inside for cleaning and maintenance and also offer added security and draft-free ventilation. The highest performing window on the market, the Tilt-turn window combines long lasting beauty and easy dependable operation. It has been the market leader in residential and commercial construction in Germany since the 1960's. The tilt-turn window concept has now gained wide acceptance inside and outside of Europe. Key Features: Easy cleaning and draft free ventilation due to dual function operation (hopper and in-swing casement window). High security and energy efficiency due to fully concealed multi-point locking hardware (standard hardware: ROTO NT ROYAL, also suitable for coastal applications) Easy installation and smooth operation due to 3-way adjustable sash construction (up/down + closing pressure + left/right). Solid construction, due to 2 3/8" thick sash and frame, with double mortise-and-tenon joinery. High energy efficiency due to triple overlay sash construction. Wide selection of handle styles and finishes to satisfy every taste and preference. Window handle design can be matched with door handles. Full range of glazing options (standard glass: 1" overall). Screens available. Custom sizes and custom designs, including non-mullion French casement and large operable sash sizes. Made from laminated solid vertical grain Douglas-Fir or a wood of your choice.