This is a front double-joint universal shaft for MO1.0/2.0. On high-grip surfaces, for example, the steering is often run at full steering angle, which places a heavy load on the universal shaft. In particular, when joints are operated at an angle, the viewpoint is spoiled and the risk of wear and tear increases.
By using a double-joint system with a large operating angle range, the shaft can operate smoothly even when steering at a deep angle, reducing the feeling of stalling in cornering. It also improves cornering speed and reduces understeer.