Check the listing for details. 50 Sets Screws M5x4mm Nickel Plated Phillips Binding Post Screw Black. Condition: New. Listed at 15.93 USD. Chicago 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.SpecificationMaterial: Nickel plated carbon steelHead Diameter of Screw & Post : 9.5mm / 0.374inchScrew Diameter: 4mm / 0.157inchPost Diameter: 5mm / 0.2inchPost-Length: 4mm/ 0.16inchScrew Length: 3mm/ 0.12inchPackage list: 100 pcs Screws, 100 pcs PostAdvantageChicago leather rivets screws are made of solid carbon steel and plated with nickel, which is rust-proof, durable, non-fading, anti-corrosion, anti-oxidation, round and smooth, flat and burr-free, will not make scratches on leather.