Accessories:Drive Shaft-2pcsM4x2.5x11 Screw Pin-4pcsOriginal Name / Part No:AX31148+AXI232017+AXI232038Product 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.