There is little substitute for the feeling of a solid metal knob resting over your tone and volume pots. Allparts stocks a sizable selection of metal knobs for guitars, bass, and even pedals. Knobs with various finishing, domes, knurling, dimensions, and inlays can be found here.
Most metal knobs are for solid shaft potentiometers; these will have a 6.35mm or 1/4 inch measurement. Knobs with a 6mm measurement will fit either the Asian solid shaft pots or the American split shaft pots. Our 0910, 3300, and 3150 series knobs will fit both split and solid shaft pots.