This MayrSino 420-piece M5 metric screw assortment is a professional-grade fastening solution for any project. Made from 10.9 grade alloy steel, these hex button head cap screws offer superior strength and are a step up from standard fasteners. The sleek, low-profile button head provides a clean, finished look, while the alloy steel offers excellent corrosion and rust resistance. Whether you're a professional working on precision machinery or a DIYer tackling a furniture repair, this kit has you covered. It includes M5 bolts in various lengths (8mm, 12mm, 16mm, 20mm, 25mm, 30mm) along with matching nuts and washers. The organized, reusable storage container keeps every piece in its place, with a clear label for easy identification. From electronics to home appliances, this comprehensive nut and bolt assortment provides a reliable, long-lasting solution for any fastening job.