Widely Usage: Alloy steel socket head cap screws can be used for fasteners of household and office appliances, communication equipment, ship assembly or other machinery industries. Quantity: 1 × Box of 180Pcs Screws + 100Pcs Nuts Complete Size 9 Screw Kit: This screw kit includes 9 screws of sizes: 4mm (20pcs), 5mm (20pcs), 6mm ( 20pcs), 8mm (20pcs), 10mm (20pcs), 12mm (20pcs), 16mm (20pcs) 20mm (20pcs), 25mm (20pcs) and 100pcs nuts, enough to meet your different needs Easy storage: screws and nuts are well packed in 10 compartments and in a transparent plastic box for convenient use and storage. Quick and easy to get the size you want Stretch and Corrosion Resistance: Made of 12.9 grade alloy steel material, this m3 socket pan head screw deals with surface oxidation, which has good resistance to expansion and corrosion in many environments Sufficient space for driving: Pan head screw allows driving in places where there is not enough space for keys. Wire Diameter: 3mm (M3); Type: