These screws and nuts 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. Nine common length screws and many nuts that you can get for general purpose use. Well packed and assorted in a transparent resealable box for convenient carry and storage. These M3 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 Size and Quantity: M3*5mm 20pcs M3*6mm 20pcs M3*8mm 20pcs M3*10mm 20pcs M3*12mm 20pcs M3*14mm 20pcs M3*16mm 20pcs M3*18mm 20pcs M3*20mm 20pcs Package Includes: 180pcs x Screws 160pcs x Nuts 1Made of 304 stainless steel material, the 304 stainless steel material provides strength and offers good corrosion resistance in many environments 2Well packed and assorted in a transparent resealable box for convenient carry and storage 3Nine common length screws and many nuts that you can get for general purpose use 4These M3 screws will be great replacement for industrial and construction fasteners 5Used widely in the home and office appliance, communication equipment, ship assembly and other machinery industry