Sotec Co., Ltd. is a mail-order company founded in 1947, known for its reliability and achievements as Daido Spring Co., Ltd. We offer standard springs called "Tri-Spring" and strong rectangular wire springs known as "Die-Spring." The Tri-Spring includes over 15,000 types of standard springs such as compression springs, extension springs, torsion springs, and circlips. The Die-Spring is a rectangular wire spring that generates strong force in a small space and is utilized in various fields, including machinery, tools, and press machines, taking advantage of its unique characteristics. Both types can be ordered from a single piece and are shipped on the same day. For bulk orders, if you provide us with your annual usage numbers, we can offer you the best prices and contribute to cost reduction. Additionally, we are open to consultations regarding custom products, prototypes, and mass production that are not available as standard items.