Extension Spring can be used in many occasions, such as production and assembly, experiment, research and development, maintenance, etc Can be used in home furniture such as door, sofa, chair, lounge chair, recliner, etc. Suitable for repairing accessories for home, construction machinery, electrical equipment, mechanical device and more. Made of stainless steel, the spring is corrosion-resistant, heat-resistant, and has a long service life. The surface has polishing treatment, making it beautiful, smooth, and rust-resistant. The stretched spring has a certain amount of elasticity and can be used in various occasions where stretching is required. Precisely processed, accurate dimensions, stable and reliable use.