Double Cardan shafts used on the front of a vehicle minimize rotational vibration and allow for smoother transmission of power, even while under stress from damper motion or cornering. These 33mm shafts are specifically designed to be used with the M-07 Concept M-chassis machine. • Axle Shafts x2 • Dog Bone Drive Shafts x2 • 3mm-thick 1050 Ball Bearings x2 • Axle Rings x4 • Other small parts included. • Compatible with M-07 Concept chassis cars.