For the extra bit of style and performance, add a Kartboy Shift Knob to your Kartboy Shift Lever. This computer designed and CNC turned Aluminum knob fits the hand with comfort, but allows a firm grip for crucial shifts. It is internally threaded. There are two colors available, a natural clear anodize and a midnight black anodize. To top it all off, a tasteful Kartboy Shift Pattern logo is added in red, blue, yellow, or black. Made in USA.