1Made of 304 stainless steel material, the 304 stainless steel material provides strength and offers good corrosion resistance in many environments 2Ideal for use in confined areas as fixing component, industrial and construction fasteners 3There are many different length of button head screws that you can use for various purposes and projects 4Total 180 pieces screws and 50 pieces nuts for general purpose use will meet your daily basic needs 5Used widely on home and office appliance, communication equipment, ship assembly and other machinery industry