【Durable for Long-Term Use】:High Quality 304 Stainless Steel provides strength and offers good corrosion resistance in many environments. 【Stressed-Bearing Surface】:Having enough stressed-bearing surface that can be screwed tighter. 【Transparent Case for Quick Access】:All of Screw and nuts will be packed in a sturdy plastic box, this set is organized by size/type in a transparent storage case for quick access and protection. 【Usage】:Widely used in the home and office appliance, communication equipments, ship assembly and other machinery industry, furniture, car and motorcycle repair and DIY inventions! Also can be use for a storage box Fixing component, industrial and construction fasteners. Ideal for use in confined areas where the head needs to be flush or below the surface. 【Basic Information】:Material: 304 Stainless Steel / Drive Type: Hex Socket / Head Style: Button Head / Size: Different Size of M3 M4 M5 (Include M3 M4 M5 Nuts) Specification: Material: Stainless Steel Drive