Premium Material This nut and bolt kit is made of high-quality carbon steel with a rust-resistant plating, offering excellent durability, wear resistance, and a smooth finish. Designed for long-term use, it provides reliable strength and good corrosion resistance in various environments. Easy to Use The nuts help distribute pressure and protect fastened components. The hex bolts feature uniform, smooth, and tightly threaded shafts that resist deformation and slipping during use, ensuring a secure fit with corresponding nuts. Easy to Carry All nuts and bolts are neatly organized in a durable, compartmentalized plastic case. The case allows for easy access, portability, and efficient storage of the assorted sizes and lengths included. Wide Applications Ideal for use in home and office appliances, communication equipment, shipbuilding, machinery, furniture assembly, automotive and motorcycle repair, DIY projects, industrial applications, and construction fastening tasks. What You Will Get 1 set of 500 pieces containing: - M3 bolts: 30 pcs each of 8 mm, 12 mm, 16 mm, 20 mm (120 pcs total) and 120 pcs of M3 nuts - M4 bolts: 20 pcs each of 8 mm, 12 mm, 16 mm, 20 mm (80 pcs total) and 80 pcs of M4 nuts - M5 bolts: 15 pcs of 8 mm, 15 pcs of 12 mm, 10 pcs of 16 mm, 10 pcs of 20 mm (50 pcs total) and 50 pcs of M5 nuts A comprehensive assortment suitable for everyday repair, maintenance, and project needs.