The crossroads knob is inspired by the blues song. It is a nice unique design with a unique feel. It is designed to fit any potentiometer up to 1/4" diameter. It is designed to self tap with a 6-32 set screw, if the part is ordered in plastic. If the part is made out of metal you may need a 6-32 tap. This is a great original design that will add character to your guitar. The functionality is not sacrificed over design.