Outstanding addition to your favorite guitar. Double star guitar knobs with black knurled sides for volume and tone control. They will fit a 6 mm knurled split potentiometer shaft. I hand make them in the USA. I also can make them to fit a 1/4" smooth shaft with a set screw. Truly unique and an upgrade that will turn heads. Please check my feedback and buy with confidence. The $ price is $55.00 for a set of three knobs.