250K DPDT push-push audio taper potentiometer, 10mm bushing M9,5 (3/8&;quot;), for metric knobs Push/Push DPDT switching potentiometer, nut and washer included. Fits metric sized knobs. You can use the switch to select pickup wiring options like coiltap or phase reversal options by just pushing instead of having to pinch a knob as common with push-pull pots. You can use hard-to-grip knobs like bell and witch hats. Using the switch while holding a pick is also convenient. As four variations (250K A type, 250K B type, 500K A type and 500K B type) are available, you can connect and wire any pickups.