Compatible with brake reset mechanism of ZF 12TX AMT gearbox, made of high-elastic alloy spring steel with quenching and tempering process. It maintains balanced and lasting elasticity with fast and accurate reset after braking, featuring excellent high temperature and fatigue resistance. It is not easy to weaken or break under long-term frequent expansion and contraction, effectively avoiding brake dragging and abnormal mechanical wear. Adaptable to heavy-load complex road conditions, it keeps the brake assembly linkage smooth and operation stable for a long time.