Traxxas Rear Heavy Duty Steel CV Driveshaft (2)This is an optional Traxxas Rear Steel Constant Velocity Driveshaft Set, and is intended for use with the Traxxas Slash 4X4 and Slash 2wd 1 10 scale short course trucks, as well as the Traxxas Rally. Traxxas Steel Constant Velocity Shafts offer the ultimate in torque handling and efficient power transfer. The outer U joints are lubricated and sealed by a rubber boot for maximum protection against the elements, and the U joint pins are held captive so