DAIERBUMP 10PCS 635mm Shaft Hole Potentiometer Volume Control Rotary Knobs Effect Pedal Knobs For for Electric Guitar Amplifier DAIERBUMP 10PCS 6.35mm Shaft Hole Potentiometer Volume Control Rotary Knobs Effect Pedal Knobs For for Electric Guitar Amplifier Widely use for guitar effect pedal knobs, amplifier control knobs, guitar parts accessories, and for controlling the effect of a variety of functions, such as level, speed, voice, etc. Easy to use, plastic control knob to be assembled to a potentiometer for easier rotation. Made of ABS plastic, the surface is smooth and feels comfortable, and there is a screw inside to fix the installation more firmly. Fits 1/4" (6.4mm) shaft pots _x000D_