Description: These screws are made of 304 stainless steel, which is resistant to rust and corrosion. There are many length for your choice which can be commonly used in home and office appliance, machinery, furniture, repair, inventions and other projects. Features: Made of 304 stainless steel material, the 304 stainless steel material provides strength and offers good corrosion resistance in many environments. Ideal for use in confined areas where you need hex socket cap head screws. Ten common length that you can choose for general purpose use. These M4 screws will be great replacement for industrial and construction fasteners. Used widely in the home and office appliance, communication equipment, ship assembly and other machinery industry. Specifications: Material: 304 stainless steel Color: Silver Type: Hex socket cap head Thread Size: M4 Length: 6mm, 8mm, 10mm, 12mm, 16mm, 20mm, 25mm, 30mm, 35mm, 40mm(optional) Package Includes: 1set x Screws .