ROTO - window fittings was based by Mr Wilhem Frank in the year 1935 in Stuttgart and works under the name ROTO Frank AG as an international company with its own industrial production capacity and advanced sales network. ROTO Frank AG deals with production and sale of finish hardware for windows and doors. Main ROTO Franks seat is German town Leinfelden- Echterdingen that lies near Stuttgartu. ROTO Frank AG composed from 15 production plants in USA and Europe and over 40 sales organizations.