〜 Secondary material of stainless steel material 〜
"The main characteristics of stainless steel are its high strength, corrosion resistance, and heat resistance. In addition, stainless steel is divided into those containing nickel and those not containing nickel, and those containing nickel do not stick to magnets and contain nickel. Those that do not are attached to magnets. In apparel, they are used for hardware such as cord stopper and hoo