Premium MaterialOur mixed screws socket head cap nuts and flat washers are made of outstanding metal material with smooth edges, which offers good corrosion resistance, rust resistance, and oxidation resistance, ensure long time using. Easy to UseThese assorted nuts and bolts and washers sets are easy to use. Our screw thread is smooth, clean, and accurate. And the compact thread is not easy to out of shape and slid in the process of rolling. Easy to StoreAll M3 M4 M5 M6 cross pan head machine screws and bolts and nuts are stored in a separate girds plastic storage box, easy to store, use, carry, and get it, perfect to replace broken and missing screws. Wide ApplicationsThis package includes a variety of popular sizes of screws, nuts, and washers, commonly used in machinery, furniture, car, motorcycle repair, environmental protection equipment, communication equipment, power facilities, electronic products, ship assembly, and DIY inventions, etc. What You Will GetYou will get 16 kinds of screws, in the size of M3*6mm, M3*10mm, M3*14mm, M3*20mm, M4*10mm, M4*20mm, M4*25mm, M4*30mm, M5*20mm, M5*30mm, M5*40mm; m6*10, m6*20, m6*30, m6*40; 4 kinds of nuts, and 4 kinds of washers; a total of 900g(about), enough for daily use, and meet your different needs in daily life.