These are NOT your average CTS pots! They are custom made to "True Vintage Taper" specifications and are as close as you will get to the pots used in vintage Gibson guitars: rigth earbelonging right curve of 30%, Tolerance under 10%, Bakelite Baseplate, Smooth action! Low turning torque = easier to turn! With Solid Brass Shaft and Thread !!! These ultimate custom audio taper American made CTS pots gives smooth, even response throughout the range of motion. Sold separately, or in matched calibrated sets of 4 (tolerance under 3%), in both long shaft and short shaft (500K only. 250K available at a later date).