Features: Made of high quality carbon steel, these screws and nuts are durable. Great for use in confined areas as fixing component, industrial and construction fasteners. There are many different length of screws that you can use for various purposes. Total 300 pieces of screws and nuts for general purpose use will meet your daily basic needs. Used widely in the home and office appliance, communication equipment, ship assembly and other machinery industry. Specification: Type: Pan head cross drive Material: Carbon steel Color: Black Size & Quantity: M3*5 20PCS M3*6 20PCS M3*8 20PCS M3*10 20PCS M3*12 20PCS M3*14 20PCS M3*16 20PCS M3*18 20PCS M3*20 20PCS 934M3 nut 120PCS Weight: 190g / 6.7oz (approx.) Package list: 1 box * Screws and Nuts Package List 1Made of high quality carbon steel, these screws and nuts are durable. 2Great for use in confined areas as fixing component, industrial and construction fasteners. 3There are many different length of screws that you can use for various purposes. 4Total 300 pieces of screws and nuts for general purpose use will meet your daily basic needs. 5Used widely in the home and office appliance, communication equipment, ship assembly and other machinery industry.