Outstanding addition to your guitar. Two  Star guitar knobs with black knurled sides, volume, and tone control knobs. They will fit a 6 mm knurled split potentiometer shaft. I hand make them in the USA. Truly unique and an upgrade that will turn heads. Please check my feedback and buy with confidence. Please message me if you need more than two knobs. I can also provide set screws for 1/4” smooth potentiometers.