This comprehensive 800-piece black carbon steel self-tapping screw set provides everything you need for precision fastening projects. The set includes M2-sized screws in eight different lengths ranging from 4mm to 20mm (4, 5, 6, 8, 10, 12, 16, and 20mm), with 100 pieces of each size. The screws come neatly organized in a durable plastic storage case with clearly labeled compartments for easy identification and access. Made from high-quality carbon steel with a black finish, these self-tapping screws are ideal for use in plastic, thin sheet metal, and wood applications. The M2 thread size makes them perfect for small electronics, model making, DIY projects, and delicate repair work. The convenient assortment box keeps screws sorted and protected from loss or damage, while the self-tapping design eliminates the need for pre-threading holes. This versatile set ensures you'll always have the right size screw on hand for your small-scale fastening needs.