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 driveMaterial: Carbon steelColor: BlackSize & Quantity:M3*5 20PCSM3*6 20PCSM3*8 20PCSM3*10 20PCSM3*12 20PCSM3*14 20PCSM3*16 20PCSM3*18 20PCSM3*20 20PCS934M3 nut 120PCSWeight: 190g / 6.7oz (approx.)Package list:1 box * Screws and Nuts