Usage Steps: M2 screw kit can be used for furniture installation, car repair, 3D printers, etc. When installing, you can use tweezers to pick up the screws, put them into the firmware that needs to be linked, then use the built-in hexagonal wrench to tighten, and then Install nuts and flat washers to prevent loosening. After use, just unscrew it and disassemble in the opposite direction, and finally put it into our storage box for next time use. | 12.9 Alloy Steel: M2 screws kit is made of sturdy 12.9 alloy steel material with black galvanizing technology. The thread is smooth without burrs, has a tight pitch, and has a certain hardness, making it suitable for long-term use under all-weather conditions. | Sufficient quantity: 830 pieces M2 screws assortment, nuts and flat washers, 270 screws, 280 nuts, 280 flat washers, flat washers help to reinforce the screws and avoid loosening. Paired with M2 hexagonal wrench and tweezers, installation and disassembly are easy. | Standardized Metric Sizes: Each metric screw in the M2 bolt and nut set comes in four different lengths. They are the 7 most commonly used sizes in daily maintenance. Complying with the standard metric system, the average error is less than 0.01mm. | Widely Applications: Our metric bolt and nut sets come in thick fixed divider boxes with internal and external labels marking the corresponding screw size and quantity for easy storage and access; the elegant box is convenient for carrying in your daily tool bag, or Make a gift for professionals and amateurs who regularly repair furniture, cars, etc.