Piano Desk Knobs Tiered Solid Brass with Metal Wood Screws - 1 Pair - Furniture Repair Tiered Small Solid Brass Piano Desk Knob - Set of 2 Metal Screws included to attach to the keyboard cover of your piano or furniture Knob measures 1/2" in height; 1/2" n diameter Designed for pianos, can be used for other furniture as well High quality