[Value Pack] 380pcs Self Drilling Screws assortment kit, consist of #8-1/2", #8-5/8", #8-3/4", #8-1", #8-1 1/4", #8-1 1/2", #8-1 3/4",#8-2", various sizes to meet your needs. [High Quality Material] Premium 410 stainless steel self-drilling screws with high hardness and corrosion resistance for metalworking. Smooth penetration, rust-resistant design. Retains magnetic properties for secure alignment. [Exquisite craftsmanship] Adopting high-precision cutting technology, the screws are sharp and conducive to penetrating all kinds of materials, the threads are very precise and clean, not easy to slip or deform when using, the force is even and the fastening strength is good. [Exquisite craftsmanship] Adopting high-precision cutting technology, the screws are sharp and conducive to penetrating all kinds of materials, the threads are very precise and clean, not easy to slip or deform when using, the force is even and the fastening strength is good. [Sturdy transparent Box] High quality, sturdy and durable plastic case, each size is individually placed for easy storage and access, saving time. Crafted from premium 410 stainless steel, these self-drilling screws deliver exceptional hardness and corrosion resistance for long-lasting performance in metalworking applications. Their advanced alloy composition ensures smooth penetration of metal plates while resisting rust and degradation. Notably, this innovative alloy retains magnetic properties, making it ideal for projects requiring secure magnetic alignment