• Includes M3, M4, M5, and M6 screws with a total of 320 units, organized in a reusable storage box. • Each screw size comes in different lengths: M3, M4, M5, and M6 with lengths of 10 mm, 20 mm, 25 mm, 30 mm, and 40 mm. • Made of high-quality 304 stainless steel, offering corrosion resistance, high temperature resistance, and durability. • Ideal for professionals, carpenters, hobbyists, and for maintenance in construction, home and office equipment, boat assembly, and more. • The set includes nuts and washers, providing a complete solution for various fastening applications.