Easy to store: All M3 M5 disc head machine screws, bolts, nuts, and washers are stored in separate mesh plastic storage boxes, making them easy to store, use, carry, and retrieve, making them ideal for replacing damaged and lost screws. High quality materials: Our mixed round head head screws, nuts, and flat washers are made of high-quality metal materials, with smooth edges and good resistance, rust prevention, and oxidation resistance, ensuring long-term use. Easy to use: These matching nut, bolt, and washer kits are easy to use. Our threads are smooth, clean, and accurate. Compact threads are not easily deformed or slid during the rolling process. Widely applicable: can be used for mechanical, furniture, automotive, motorcycle maintenance, environmental protection equipment, 3D printing equipment, communication equipment, power facilities, electronic products, ship assembly, and DIY inventions., Weight: 2.0723452628 pounds, Manufacturer: Xnuiasqe