I searched for my knob part number, looked at the nice online photos of the knobs, made my selection, and purchased them. Nice and easy. Received the knobs promptly in perfect condition. Would definitely use and recommend! The knob has a nice weight, and a perfect mirror finish. Hafele makes a nice product. They make a HUGE improvement to our existing cabinets' appearance, and the swap took about 10 minutes with only a screwdriver!