Deltana is an architectural hardware manufacturer with a proven record for exceptional service and quality. Deltana inventories America's largest selection of architectural and door hardware in over nine fine finishes made from solid brass, zinc, aluminum, steel, and stainless steel. Deltana olive knuckle hinges are a very versatile application to all kinds of doors and cabinets, also allowing an easy mounting of the doors. They come in an array of fine finishes that maintain the quality.