Accessories:Drive Shaft-2PCSM4x2.5x11 Screw Pin-4PPCSOriginal Name / Part No:AXI232017+AX31148Product major functions & usage:1. Transferring the power from the motor to the whole vehicle.2. The alloy 6061 T6 and steel mixed material combination is strong and powerful but also maintain light in weight.Major advantages of upgrading to this part/product :1. The alloy 6061 T6 and steel mixed material combination is strong and powerful but also maintain light in weight.2. CVD design swing joint for stronger power transmission.