03569 Standard Guitar Knobs Set of 5

5-Piece Standard Knob Set. Black Knobs w/metal insert. 1-Bass Volume, 1-Treble Volume, 1-Bass Tone, 1-Treble Tone and 1-Smaller Knob Unmarked. Slotted Set Screw. All knobs are interchangeable for all instruments.

They do have set screws