SAAGE Treppenbau & Biegetechnik is a German, family-run master craft business based in Nettetal-Leuth. Founded in 1952, it has grown from a small agricultural machinery forge into a specialist manufacturer serving customers in Germany and internationally. The company designs and builds custom staircases for homes and commercial projects, including structural, stringer, spiral, solid-wood, central-spine, twin-spine, folded and glass staircases. It also produces railings, balustrades, metalwork and individual art objects, with planning, fabrication, delivery and installation among its services.

SAAGE supports private clients, architects, businesses, metalworkers, joineries, municipalities and artists, combining design advice with skilled production and project coordination. Its metalworking capabilities include rolling and bending, cutting services, post milling and 3D profile-tube laser processing. The company can supply individual components, complete staircases and semifinished products, including work using customer-provided material. With more than 50 employees, SAAGE emphasizes tailored solutions, precision, reliable service and on-time installation. Customers can also visit its three-storey staircase and railing exhibition in Nettetal, with appointments available on weekends by arrangement.