Aged Copper, beautiful Indian/buffalo nickel volume, and tone control knobs to highlight your special guitar. They fit a common 6 mm knurled split potentiometer shaft and stand 5/8" high and 1" wide. They will fit flush with your guitar covering the potentiometer nut. Please check my feedback and buy with confidence. The $37.50 price is for a set of two knobs. I hand make these in the USA. I can also provide a set screw for a 1/4" smooth post.