Description: Made of high quality stainless steel, corrosion resistant and durable for a long time use Easy to install and durable to use These screws and nuts will be great replacement for industrial and construction fasteners. Used widely in the home, office, school, hospital, garden, bicycle, motorcycle, automobile, workshop, electric equipment, ship assembly and other machinery industry. All of screws will be packed in a sturdy plastic box, can be use for a storage box. Specification: Material: 304 stainless steel It contains the following sizes: 20pcs x M2 X 20 20pcs x M2 X 16 20pcs x M2 X 12 20pcs x M2 X 8 80pcs x M2 Nuts 20pcs x M3 X 20 20pcs x M3 X 16 20pcs x M3 X 12 20pcs x M3 X 8 80pcs x M3 Nuts 20pcs x M4 X 20 20pcs x M4 X 16 20pcs x M4 X 12 20pcs x M4 X 8 80pcs x M4 Nuts Size Chart: 1 Piece Hex Set Screw Assortment Kit (480pcs) Package Includes: 1.We provide clear pictures, measurements where possible. Please check as much as possible to make sure the item is the one that you need. 2. Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) 3. Instruction is not included.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand,Thank you