: These screws and nuts are made of 304 stainless steel, which is resistant to rust and corrosion. There are many sizes in one set which can be commonly used in home and office appliance, machinery, furniture, repair and inventions. Features: Made of 304 stainless steel material, the 304 stainless steel material provides strength and offers good corrosion resistance in many environments. Environment-friendly, no pollution, high hardness fixing component, industrial and construction fasteners. Nine common sizes for general purpose use, meet daily basic needs. Well packed and assorted in a transparent plastic box for convenient use and storage. Used widely in the home and office appliance, communication equipment, ship assembly and other machinery industry. Specifications: Material: 304 stainless steel Type: Pan head Size and Quantity: M2*6mm Screw          20pcs M2 Nut                        20pcs M2.5*8mm Screw       20pcs M2.5 Nut                     20pcs M3*8mm Screw          10pcs M3*12mm Screw          5pcs M3*16mm Screw          5pcs M3 Nut                        20pcs M4*8mm Screw            5pcs M4*16mm Screw          5pcs M4 Nut                        10pcs M5*8mm Screw            5pcs M5*16mm Screw          5pcs M5 Nut                        10pcs Box Size: 12.5 x 6.3 x 2.3cm / 4.92 x 2.48 x 0.9" Weight: 152g(approx.) Package Includes: 80pcs x Screws with Washers 80pcs x Nuts Note: 1. Please allow 1-3mm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.