This 420-piece self-drilling screw assortment kit includes 18 common sizes in #8 and #10 formats for a wide range of fastening jobs. Made from 410 stainless steel, the screws are built for strength, rust resistance, and reliable performance in demanding environments. The kit includes both Phillips washer head and hex head screws for added versatility across metal, wood, aluminum, PC panels, and angle brackets. Sharp drill tips allow fast installation without pre-drilling, while deep threads help provide a secure hold. A storage box and various driver bits are included for better organization and convenience.