Features:100% brand new and high qualityHigh quality material: Hexagon head bolt set is made of high quality 304 stainless steel, 304 stainless steel has good corrosion resistance, rust resistance and oxidation resistance, can ensure long-term use.Different sizes: our lock nuts are M3 sizes, from 4mm to 30mm in length, in 12 designs. A single purchase can meet your diverse needs.Excellent workmanlike: our screw set is very sharp, clean and accurate. The dense wire is not easy to deform and slip in the process of rolling. The deep and clear inner hexagon and screw head make your work easier.Wide range of applications: These hexagonal socket screws are suitable for repair shops, carpenters and construction workers. The kit can be used in precision machinery industry, electronic products, household appliances, lamps or toys, etc.Easy to store: all hex bolts and nuts are sorted by size/type and packaged in a strong, transparent plastic case for easy storage and use, avoiding unnecessary waste. Package Includes:55 x M3x4 55 x M3x555 x M3x655 x M3x855 x M3x1055 x M3x1230 x M3x1430 x M3x1630 x M3x1830 x M3x2030 x M3x2530 x M3x30300 x M3 Washers300 x M3 Nuts1 x Wrench Specifications:Material: Stainless Steel Size: M3x4, M3x5, M3x6, M3x8, M3x10, M3x12, M3x14, M3x16, M3x18, M3x20, M3x25, M3x30. note:Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item.