Large black plastic control knob with set screw and brass insert. The two different options include one version with a black plastic top and another version with a radial-brushed metal cap with a chamfered edge, each sold separately. The grip has a smooth straight knurl and the skirt features an arrow indicator. The black top version is a close match to the knobs used on vintage Arbiter Fuzz Face® pedals. Fits ¼” (6.35mm) pot shafts.