Check the listing for details. 16mm Chicago Screws, 20 Sets Plastic Chicago Screw Slotted Binding Post. Condition: New. Listed at 10.97 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: plasticHead Diameter of Screw & Post : 11mm / 0.43inch( 3/7 )Screw Diameter: 4mm / 0.157inchPost Diameter: 5.5mm / 0.22inch(2/9)Screw Length: 4.8mm/ 0.19inchPost-Length: 16mm / 0.63INCHPackage list: 20 pcs Screws, 20 pcs PostAdvantageChicago leather rivet screws are made of plastic, with a clear, smooth, sturdy and durable surface, and will not leave scratches on the leather.Instruction The chicago belt screws are easy to install and remove repeatedly. Simply install two parts from both sides to achieve the binding effect.