Ability to extend the a Logitech, Thrustmaster, Fanatech or any other gear shifter to 18 speed transmission American Truck Simulator, European Truck Simulator, SimuRide PE, and many other truck simulators can use this knob to extend range of gears with Easy Jake Brake.Is compatible with any stick that has diameter up to 7/16 inch; it can be rounded or squared in shape. So, any Logitech or Thrustmaster shifter will fit. If you need 1/2-inch diameter, you can re-drill the knob aluminum base to enlarge it. You will get knob with 3 holes in its base to mount on the shaft, but you will use only 2, so we supply 2 screws. The third hole in a knob base doesn't have thread and is made to install the knob on a real truck shifter shaft. The Windows recognizes it as a separate device connected by the USB.