200 Pieces Tension Springs Assortment, Compression Springs, Assorted Extension Spiral Kit, Metal Extended Compressed Set with Storage Case

【High quality material】 The tension springs are made of high quality material, which is stable, reliable, smooth, rustproof, high ductility, good fatigue resistance, and durable for long time use. 【Smooth edge】 Our torsion springs have excellent workmanship, the surface is carefully treated and does not scratch, the inner spring is firm and not easy to break. The edge is smooth and won't hurt your hands. 【Important tools for the family】 The expanded and compressed springs sets are easy to use and store, and a must for the household. You will love this spiral spring. 【Package Icludes】You will receive 8 sizes of compression spring and 12 sizes of extension spring to choose based on your requirement. It is enough for your daily use. 【Widely used】 The steel springs are used in automobile engines, main electrical equipment, medical equipment, electronic products, and other measuring equipment.