The 290 Pcs Stainless Steel Cotter Pins Set includes a variety of sizes ranging from M6 to smaller diameters. Made of high-grade 304 steel, these hairpin and straight cotter pins are perfect for fastening applications in various industrial and business settings. The set comes with 290 pieces, providing ample quantities for diverse usage. This product is designed for precision and durability, making it a reliable choice for securing components in a range of projects.