Original Fender S-1 switching 250K volume and tone control with split shaft. 4 pole/double throw push/push switch allows for advanced switching options not possible with standard double pole push/pull pots or mini switches. Used in Fender American and Deluxe model guitars and basses. Fender part number 0061256049 Fender S-1 Pot Specs Ohms: 250K Taper: Audio Tolerance: +/-15% Pot Diameter: 15/16" (.9375") Shaft Material: Brass Threaded Shaft Length: 1/4" (.25") Shaft Type: Split Knurled Threaded Shaft Material: Die Cast Spline Count(Type): 24 (Fine) Threaded Shaft Diameter: 3/8" (.375") Spline Height: 3/16" (.375") Thread Pitch: 3/8-32NEF