Tensioner seat belt is our life support, we must pay attention to the use of seat belt. Tensioner use method must not change the working structure of the safety belt. If a serious collision or rollover occurs, the seat belt must be replaced. If the seat belt is damaged by chemical action or sunlight, open or loose deformation, then the seat belt must be replaced. If the seat belt metal connection is bent, deformed or rusted, then the seat belt must be replaced. When the performance of the safety belt is not good, must replace the lever tensioner safety belt. Tensioner manufacturer if you use not in the FIA registered seat belt, its thickness is not less than 1.5 mm, the width is not less than 50 mm.