1,Galvanized Steel Material: Hex socket screws are made of galvanized steel, high strength, durability and corrosion resistance 2,Sufficient Quantity: There are 50pcs round head hex socket screws in a set of sufficient quantity to meet the various needs of users 3,Application: Widely used for various accuracy machinery industries, classified instruments, instruments, electronics, printing projects, etc. 4,Basic Specifications: This is round head hex socket that is easy to install, the thread model is M4x0.7mm 5,Scope of Application: Used for machinery industries such as household and office electrical appliances, communication equipment, ship assembly, etc. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.