Due to the plug-in principle with binding adjustment you get a prim view interior and exterior.

Not a single screw and no single construction accessory bothers the facade. This has a very creative effect particularly for sandwich facades with concealed fixing. Since the frame is welded on all four corners also no mitre cuts bother the appearance.

The complete frame has a homogene surface which isn't influenced by a disturbance. Due to the beveled construction of the frame it is possible to resign a window sill.