Check the listing for details. 4mm Studs for Clothing, 50 Sets Studs Spikes Leather Rivets Screw, Black. Condition: New. Listed at 10.36 USD. Leather rivets screws are widely used for DIY projects such as belts, handbags, bags, shoes, dog collar, jacket, clothes, leather, leather saddles, wallets, fabric, leathercraft, decorative, crafts, and so on. It's an useful accessory for your daily.SpecificationMaterial: alloyScrew Size: 5.5*7* 3 mm ( M3)Spike Studs Size: 4x6x8.5mm / 0.16x0.24x0.33 inch ( Head x Bottom x Height )Package list:50Set Round Head Leather Studs RivetsAdvantageStuds and spikes are made of alloy, which is rust-proof, durable, non-fading, anti-corrosion, anti-oxidation, round and smooth, flat and burr-free, will not make scratches on leather.Instruction The metal spike studs are easy to install and remove repeatedly with screwdriver. Simply install two parts from both sides to achieve the binding effect.