?material?Our Chicago screws are made of high-quality carbon steel and have a high-quality nickel plating process on the surface. They are smooth, burr free, waterproof, durable, and have high hardness. Even in harsh environments, they can resist corrosion and moisture. You can use them with confidence without worrying about rust, fading, or deformation. ?package?Our Chicago screw kit is stored in a delicate transparent box with corresponding labels, making it easy for you to quickly find various sizes. We also have heat shrink film treatment on the outer packaging to ensure that each box of Chicago screw kit is new and better protected from air oxidation. ?Perfect specifications?Our Chicago screw set has 110 sets of screws, each in 8 sizes (M5 * 4, 5, 6, 8, 10, 12, 15, 18mm), with sufficient quantity and various lengths to meet your needs in different scenarios (purpose)Our leather rivet kit is used for leather crafts, as a fixed or decorative item. For example: belts, bag decorations, clothing decorations, key bag nails, stationery ledger nails, leather bracelets, photo album nails, calendars, various DIY projects, and so on (Usage) First, use a punch to drill holes at the location where you want to install screws; Secondly, select the appropriate pipe height, thread the bolt through the hole, align the nut with the bolt, and tighten the screw with a screwdriver.