Wooden knobs. Sold as a set of 4. Can be used as pot knobs for guitars, basses, and other instruments with knobs. They are attached to the POT with a hex wrench, so they can be used regardless of the standard, such as metric or inch. They would look great paired with instruments with ebony fingerboards, or by matching the color tone to wood-grain guitars/basses. Also, surprisingly, they go well with modern design guitars like Strandberg and Aristides, and by attaching them to modern instruments, you can create a natural look as a one-point accent. I think it's rare to find a set of 4 at this price, so please take this opportunity. Although they are new and unused, they are handmade, so there may be individual differences and minor scratches from the time of production. Please refrain from purchasing if you are sensitive to this. Shaft diameter: 6 mm Pot diameter: 20mm Pot height: 17mm #GuitarParts #WoodenGuitarParts #WoodKnob #WoodenKnob