Porcelain doorknobs gained popularity in the United States during the Victorian era and were first mass produced during the industrial revolution. The original colors available were only black and white knobs. During this time period the style of hardware used in the home was considered a focal point of design. This set is available in a variety of finishes, styles, and functions. We assemble all of the door knob sets here in Michigan. If you require some custom work - simply contact us and we will work with you.