These Hosco control knobs are in the 'chicken head' design commonly used on guitar amps and pedals. Reminiscent of the Davies/Daka-ware 2150 style and named after their characteristic shape, the pointed beak with a white position indicator line makes setting the knob position as easy as can be. With a knurled interior, these will fit metric 'import' potentiometers (coarse 18 spline pots e.g. Alpha).