Package includes: You will receive a box of 1080pcs of black hex socket bolts, including screws, nuts and flat washers, and 3 wrenches, which can meet your daily needs. High-quality materials: Made of high-quality carbon steel, with high strength and good rust resistance, sturdiness and durability, and can be used for a long time under high or low temperature conditions. Multiple sizes: M2*4-M2*20, M3*4-M3*30, M4*6-M4*30, 20 for each size. There are 120 M2/M3/M4 nuts and washers in each size, which can meet different needs and are essential hand tools for families. Easy to store: All screws, nuts and washers will be packed in a transparent storage box, which is convenient for storage and carrying to avoid loss or confusion. You can quickly take out the items you need. Wide range of uses: Hexagon socket screw sets can be widely used in various precision machinery, classified instruments, meters, electronic products, household appliances, communication products, locks, lamps, toys, etc. Features: 1. The surface of the hexagon socket bolt and nut set has been oxidized to prevent rust and corrosion. 2. The nuts and flat washers enlarge the contact area and reduce the pressure to protect the screws and parts. The thread with compact and uniform force is not easy to deform and slip during rolling and installation. 3. The set is organized by size/type in a clear storage box for quick access and protection. 4. Hex bolts can easily go through various materials, such as plastic, wood, soft metal, etc. choose to use. Specifications: Material: 12.9 grade carbon steel Color: black Screw size: (as shown in the picture) M2 M3 M4 (including M2 M3 M4 nuts and washers) Weight: 712g Quantity: 1080 PCS Package includes: M2 M3 M4 bolts and nuts set 3 x hex wrench 1 x storage box Delivery quantity: 1080pcs/box (with three wrenches) Product color: black Product Size: M2Washers, M2Nuts, M2*20, M2*16, M2*12, M2*8, M2*6, M2*4, M3Washers, M3Nuts, M3*20, M3*16, M3*12, M3*8 , M3*4, M4 Washers, M4 Nuts, M4*30, M4*20 , M4*18, M4*14, M4*10, M4*6 Wrench Size: 1.5, 2.5, 3 Note: Manual measurement, please allow 1-3mm error.Yeuri