Wide Application: The CASAON Self Tapping Screws Assortment Set is designed for versatility and can be used effectively in metal, wood, and plastic applications. With sharp points that facilitate easy penetration into various materials, these screws are ideal for both professional and DIY projects. Material Workmanship: Crafted from high-quality 304 stainless steel, CASAON screws offer exceptional strength and durability. Their corrosion-resistant properties ensure longevity, making them suitable for use in challenging environments. The precision-engineered screw threads are sharp and robust, minimizing the risk of stripping during installation. Customized Set: This thoughtfully curated assortment includes a total of 570 pieces, comprising 285 flat head screws and 285 round head screws across M3, M4, M5, and M6 sizes with varying lengths. This extensive selection ensures that you have the right screw for any job, making it an essential addition to your home or workshop. Storage Box: The screws are conveniently organized in a sturdy storage case, designed for easy access and portability. This organized system allows you to quickly find the required screw size without hassle, saving you valuable time during projects.