High quality 304 stainless steel. Stainless steel is a common material with a density of 7.93 g/cm3, also called 18/8. It has good machinability and high toughness up to a temperature of about 800 degrees. Various screw sizes: M2*4 - M2*20, M3*4 - M3*30, M4*6 - M4*30 to meet different needs. It is a very important hand tool for the family. With M2, M3 and M4 nuts and washers, the installations are now more precise and the contact area is increased, reducing the pressure and protecting the parts and screws. The nuts and washers are arranged in a storage box, so you can easily find the series when needed and avoid losses. They are antioxidant and even corrosive at high temperatures. The stainless steel hexagon screw is mainly used in electronics, electrical appliances, chemicals, water, machinery and equipment, furniture and many other areas. Material < p>High-quality 304 stainless steel. It is characterized by good machinability and high toughness up to a temperature of about 800