This is the optional MIP C-Drive Spline CVD Kit for use on the Traxxas T-Maxx 3.3 FEATURES: Steel construction Black in color INCLUDES: Two Female Bones Two Male Bones Four Drive Hubs Four Couplings Eight 4x5mm Set Screws Four 3/32" x 5/8" Cross Pins REQUIRES: Installation on the vehicle cnh 10/16/09 ir/jxs