Topstar - Functional Fenestration Inc.

Winkhaus is based in Germany and has more than 150 years experience in producing locking hardware.

Winkhaus is based in Germany and has more than 150 years experience in producing locking hardware.

Winkhaus is based in Germany and has more than 150 years experience in producing locking hardware.

For wood, PVC/vinyl, wood/aluminum combo or composite sashes
Flush sash is ideal for North American window style preferences.
Concealed-hinge windows have a clean appearance, and are suitable for historic building renovations.
Now in stock!

One handle operation to swing and lock windows.
High strength, security and warp prevention from multiple cam lock points.
Operable windows that satisfy green building goals for natural ventilation and daylight.
10 year Winkhaus warranty against manufacturing defects
Fully concealed tilt turn fittings for design windows
Lock spindle hub: for 7 mm square spindle.
Tested for corrosion-resistance to Grade 4 (of 5) EN 1670 standard
Anti-mishandling device included.
Casement function opens to 95 degrees.
Simple three dimensional adjustment.