The Fingertip Design 17mm Ringed Cupboard Knob Satin Nickel is a solid one piece knob ideal for bedrooms and study furniture.  Its ringed design gives it extra grip and makes it easy to use. Knob Finish This knob has a traditional satin nickel finish.  It would be suitable for all types of fitted or free standing furniture in residential situations and is simple to fit and maintain. Cupboard Knob Dimensions The Ringled Cupboard Knob has a 17mm knob diameter and a 17mm rose diameter. It is supplied with appropriate fixing screws.