500k log Push-Pull audio pot Bourns Knurled Shaft. Bourns Mini Carbon Element, DPDT Push Pull Switch, Single Audio taper Potentiometer. Split Shaft, Solder Lugs. This Bourns Guitar Potentiometer with Push-Pull Switch allows the guitarist multiple functions utilizing a single control such as split-coil switching for humbucking pickups or stacked single-coil pickups, active electronics activation, and pickup phase switching.