Jack Daniels And Honey Bee Guitar Knob.. Condition is "New". Shipped with USPS First Class. Outstanding upgrade for your guitar with these rustic Jack Daniels.knobs sure to turn heads. They will fit a 6 mm knurled potentiometer shaft. I also can adapt them to fit a 1/4" smooth shaft. Please check my feedback and buy with confidence. I hand make my knobs in the USA. Message me if you need three knobs.