General description Made of high-quality carbon steel, this 1225PCS M2 M3 M4 M5 Carbon Steel Hex Socket Head Cap Bolts Screws with Nuts Assortment Kit features high strength, wear resistance, and durability. The kit includes a variety of bolts and nuts in four specifications, along with suitable spacers to meet different needs. It is widely used in various applications, including electronics, hardware, lighting, toys, bathrooms, furniture, and sports equipment. The total of 1225 pieces ensures you have enough for replacement and use, all conveniently stored in a plastic box. Technical specifications Material: Carbon steel Total parts: 1225 pieces Specifications included: M2, M3, M4, M5 bolts and nuts Other information