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, and the temperature can reach about 800 degrees. Various screw sizes: M2, M3, M4 to meet different needs. It is an indispensable hand tool for the family. Please refer to the image for quantity of different models With M2, M3 and M54 nuts and washers, installation is now more precise and the contact surface is increased to reduce stress and protect parts and screws. Screws, nuts and washers are all stored in a storage box, allowing you to easily find your way around the collection and avoid losing it if necessary. Resistant to oxidation and corrosion even at high temperatures, the main use of stainless steel hexagon socket head cap screws is very common in many fields such as electronics, electrical appliances, chemicals, water, machinery and equipment, and furniture. Due to manual measurement, the product you receive