2135Pcs Black M3 Metric Screw Assortment Kit, 5-35Mm Button Head Screws And Product introduce: M3 Metric Screw Assortment Kit (Button Head Screws and Socket Head Screws); These m3 bolts can help you to repair all kinds of electrical appliances, furniture and bicycle in your daily life. Material: These m3 screws are made of 10.9 12.9 grade alloy steel, which have strong corrosion resistant, excellent rust resistance and good oxidation resistant. These m3 bolts can also be used in humid environment for a long time. Two Head Types: button head socket head, can be used according to your needs. Drive type: hex socket; M3 bolts and nuts are packed in a labeled plastic box, which is convenient to storage, select and use. Our m3 screw assortment set comes with two hex wrench, which is convenient for you to install. Wide application: This m3 screw assortment kit is suitable for 3D printers, precision machinery industry, household appliances, electronic equipment, furniture, buildings, DIY projects, etc. Product include: Our m3 screw kit has a total of 2135 pieces (280pcs socket head screws 250pcs button head screws, 535pcs nuts, 535pcs flat washers, 535pcs lock washers) with 2 hex wrench.