Description: These screws and nuts are made of 304 stainless steel, which is resistant to rust and corrosion. There are many different sizes in this set which are commonly used in home and office appliance, machinery, furniture, repair and DIY inventions. Features: Made of 304 stainless steel material, the 304 stainless steel material provides strength and offers good corrosion resistance in many environments. Environmental protection, no pollution, high hardness. A lot of different sizes for general purpose use will meet your daily needs. Packed in a transparent plastic box, good for storage and hard to be damaged. Widely used in home and office appliance, communication equipment, ship assembly and other machinery industry. Specifications: Material: 304 Stainless Steel Type: Hex Socket Head Screw Size & Quantity: Screws: M3 x 6mm 50pcs M3 x 8mm 50pcs M3 x 10mm 50pcs M3 x 12mm 50pcs M3 x 16mm 50pcs M3 x 20mm 50pcs Nuts 300pcs Box Size: 12.5 x 6.3 x 2.3cm / 4.92 x 2.48 x 0.9 Weight: Approx. 330g Package Includes: 300pcs Screws 300pcs 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.