Use this Hop-Up Option set to change the dog-bone type propeller shaft found in the stock XV-02 chassis to a universal propeller shaft for increased stable, and efficient performance. Aluminum Swing Shaft x1 Input Shaft x1 Cross Joint x1 2x9.8mm Shaft x1 3x2.5mm Grub Screw x1 Propeller shaft and input shaft have a firm joint for easy maintenance. Compatible with XV-02 chassis cars. (Can be used either front or rear. )