1.Mostly use in amp, amplifier, effect pedal, stomp-boxes,etc.
2.The skirted knob has metal set screw, fits common 1/4 inch solid shaft imperial size pots, fits most USA made amp/pedal device and USA CTS/Fender/Bourns/Dimarzio standard pots.
3.If your pot is split shaft, please ensure you know the set screw must be inserted into correct position
4.These knobs are made of bakelite, stronger and heavier than plastic
5.2 volume and 2 Tone knobs, Numbers 1-10