[Material] High quality material has good corrosion resistance in high temperature, cold weather, high humidity and other harsh environments. They have excellent rust and oxidation resistance, which can long-term use. [Packing] Packed in a durable transparent box with a label. It is easy to distinguish the product size. When you want to use a certain screw, you don't have to waste time to buy it separately, you can choose the right one to meet all your needs. [Wide use] Widely used in various precision machinery industries, sorting equipment, electronic products, printing projects, household appliances, communication products, locks, lights, toys, etc. Type: Pan Head Hexagon (Metric) colour:Silver Material:Stainless steel Package Contents: 30 x M3x8 mm Screw 30 x M3x12mm Screw 30 x M3x16mm Screw 30 x M3x20mm Screw 120 x M3 nuts 20 x M4x8 mm Screw 20 x M4x12mm Screw 20 x M4x16mm Screw 20 x M4x20mm Screw 80 x nut 15 x M5x8 mm Screw 15 x M5x12mm Screw 10 x M5x16mm Screw 10 x M5x20mm Screw 50 x M5 nut 3 x Hex wrench Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.