These are top quality CTS potentiometers with split shaft 24 spline shafts for push on knobs. Brass adapters are available if you’d like to use set screw knobs for 1/4 inch smooth shaft potentiometers.
These are developed using ±9% tolerances and a value at 10% over the standard ohms rating (275 kohms for 250, and 550 kohms for 500). This ensures not only optimum performance, but guarantees your potentiometers will always be at least the value stated.
Compared to many others using 20% tolerances (where you can be over spec, but in most cases far below). These specifications ensure good tone from your pickups. They also have brass components and a high quality wiper versus what comes standard on most run of the mill potentimeters to ensure long life, quality and consistent performance.