It is turn only systems applied in balcony doors in particular. Although they are doors, they work like windows. Its arm is inside. It is not possible to control, open, close it from outside. Suitable for high joineries. Different threshold application can be made. More widths, more trouble causing risks.
Window Pattern Options
Cedar
Golden Oak
Oak
Mahogany
Grey
Anthracite
Smooth Anthracite
Anteak
Trompet
Dark Oak
Eiche Rustical
Silver D (Silver Grey)
Ash