Mini Slash 4X4 steel constant velocity shafts offer the ultimate in torque handling and efficient power transfer for high-power brushless applications. On the axle side, snap rings secure the drive pins in place to prevent back-out. Large-bore drive pins are press-fit on the differential side and slot into the heavy-duty steel drive cups. Set includes front and rear driveshafts, drive cups (4), and screw pins (4).