The aluminium windows, doors and lift-and-slide systems in our range are fitted with GU (Gretsch-Unitas) hardware, from a renowned German manufacturer with a long tradition of developing innovative opening and locking systems. Thanks to premium craftsmanship, precise mechanics and reliable performance, GU hardware ensures easy, precise and secure operation, a long service life and a high level of functionality in everyday use. GU develops hardware for modern aluminium systems, with solutions engineered for stable performance even in larger-sized elements. Its lift-and-slide door systems stand out in particular, an area where GU has been a recognised name ever since developing the first Lift & Slide hardware back in 1958.

The PVC windows and tilt-and-slide systems in our range are fitted with ROTO hardware, from a renowned German manufacturer with a long tradition of developing innovative window and door hardware. Thanks to premium craftsmanship, precise mechanics and ongoing product development, ROTO hardware ensures easy, reliable operation, a high level of security and a long service life in everyday use. Its solutions for tilt-and-slide systems stand out in particular, offering simple operation, reliable sealing and various ventilation options, with stable performance even in larger-sized elements.

Through continuous development and innovation, both GU and ROTO are today among the world's leading manufacturers of hardware for windows, doors and sliding systems.