Description: These screws are made of 304 stainless steel, which is resistant to rust and corrosion. There are many lengths of screws in this set 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. There are eight different lengths of screws in this set that you can use as need for general purpose or projects. These M3 screws will be great replacement for industrial and construction fasteners. Well packed and assorted in a resealable transparent plastic box for convenient carry and storage. 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*6mm 20pcs M3*8mm 20pcs M3*10mm 20pcs M3*12mm 20pcs M3*16mm 20pcs M3*20mm 20pcs M3*25mm 20pcs M3*30mm 20pcs Box Size: 12.8 x 6.6 x 2.2cm / 5.04 x 2.6 x 0.86" Package Includes: 1box(160pcs) x Screws