Widespread Use: Alloy steel socket head cap screws can be used for fasteners of household and office household appliances, communication equipment, ship assembly or other industries machinery. Quantity: 1 × Box of 180Pcs Screws + 100Pcs Nuts Full Size 9 Screw Kit: This screw kit includes 9 screws sizes: 4mm (20pcs), 5mm (20pcs), 6mm (20pcs), 8mm (20pcs), 10mm (20 pieces), 12mm (20 pieces), 16mm (20 pieces) 20mm (20Pcs), 25mm (20Pcs) and 100pcs nuts, enough to meet your different needs Ease of storage: Screws and nuts are well packed in 10 compartments and in a clear plastic box for convenient use and storage. Quick and easy to get the size you want Extension and Corrosion Resistance: Made of 12.9 grade alloy steel material, this m3 socket head cap screw treats with an oxidation surface, which has good resistance to extension and corrosion in many environments Sufficient space for driving: The socket head screw allows driving in places where there is not enough room for keys. Wire