Aluminium has proven its modernity and reliability as a construction material for over half a century now. With its specific attributes and aesthetic appeal, this lightweight metal material can offer a satisfactory solution and be applied to wherever other materials prove unusable. Küffner has been exploiting this knowledge, and has consequently developed and produced special aluminium frames for doors made of wood, synthetics and glass for the most diverse objects for several decades now. Building on the clear design language of aluminium frames, Küffner developed five additional product groups that have subsequently been used for high-quality interior fittings.