These handy binding screws are one of those things you don't realize you need until you discover them! This set includes 20 stainless steel barrel nuts and bolts with an M6×8mm thread size, perfect for all kinds of binding and riveting projects. The screw head diameter is 13mm, and the female thread top measures 8×20mm - substantial enough for secure fastening without being overly bulky. Made from quality stainless steel, these won't rust or corrode over time, ensuring your projects stay securely fastened. Installation is super simple - just insert the screw through your materials, thread on the barrel nut, and tighten with the included M4 Allen wrench. No special tools or skills required! These are incredibly versatile - use them for thin albums, decorative bags, leather crafts, belt making, sandals, furniture assembly, cabinets, and so much more. The black finish gives them a sleek, professional look that works well with various materials. Whether you're a DIY enthusiast, leatherworker, or just someone who frequently needs reliable fasteners, having these on hand is incredibly useful. The set of 20 means you've got plenty for multiple projects or for when you need extra security with multiple fastening points. They provide a much cleaner look than traditional screws and nuts, with the barrel nut creating a finished appearance on both sides. If you work with leather, wood, or various crafts and need a sturdy yet attractive fastening solution, these binding screws are absolutely worth having in your toolkit.