Binding screws are widely used for DIY projects such as belts, handbags, shoes, clothes, leather bracelets, books, scrapbooks, photo albums, leather saddles, wallets, cookbooks, presentation folders, advertising brochures and so on. It's an useful accessory for your daily life.Specification:Color: Bronze ToneMaterial: Carbon SteelThick of Screw & Post: 1.5mm/0.06 inchHead Diameter of Screw & Post : 9.5mm / 0.374inchScrew Diameter: 4mm / 0.157inchPost Diameter: 5mm / 0.2inchPost-Length: 6mm/0.24 inch; 10mm/ 0.39inch; 15mm/0.59inch; 25mm/0.98inch; 35mm/1.38inch; 45mm/1.77inchScrew Length: 5mm/ 0.2inch120pcs chicago screws with post (10pairs M5x6mm+10pairs M5x10mm+10pairs M5x15mm+10pairs M5x25mm+10pairs M5x35mm+10pairs M5x45mm).