This official Fender CTS Dual 500K/250K Split Shaft Pot/Potentiometer has fine 24 spline mounting for imperial sized knobs. This is a dual (2 gang) potentiometer and so has independant solder lugs for the 500k and 250k pots and both are adjusted via the single shaft at the same time. Both potentiometers have a logarithmic audio taper and a mounting nut and lock washer are included.