Wood Piano Desk Knobs Walnut with Screws - 1 Pair - Furniture Repair Wood Piano Desk Knob - Set of 2 - Walnut Screws included to attach to the keyboard cover of your piano. Rubber buttons Included. Knob measures 5/8" in height; 5/8" in diameter. Designed for pianos, can be used for other furniture as well Furniture Repair