Clockwork spring is also known as the coil spring, clockwork spring is generally made of stainless steel 301 production, such as the application of Longming spring spring raw materials are generally imported SUS301, imported stainless steel quality will be better, the production of clockwork spring ductibility is stronger, mainly fatigue resistance, corrosion resistance, there are some goods are seaside work, Then Longming made clockwork spring can be integrated according to customer regulations. So stainless steel surface is of course white transparent color, why the spring on the market looks all with light yellow, white transparent color is very little. In fact, it is a spring production after heat treatment process production and processing, and then after high temperature hair more resistant to fatigue, longer service life. The application of torsion spring clockwork spring is more and more common, the vast majority of industries in China are in use, such as small toy industry, vehicle industry, sports and culture industry, household appliances industry, but do not know the provisions of the clockwork is also more and more high, such as the application of the clockwork spring on the car seat belt, the provisions are very high.