- 152-piece bronze screw rivet kit, designed for leatherwork and crafts - Includes round heads in 5 sizes (5, 6, 8, 10, 12 mm), 4 mm screws, punch, and screwdriver - Material: high-hardness carbon steel, durable, rust and corrosion resistant - Easy installation: select the right size, pierce the leather, and tighten with the screwdriver - Transparent organizer box to keep pieces tidy and easy to use - Versatile use: ideal for belts, bags, clothing, keychains, books, albums, and more - Deep threads for secure, slip-free fastening - Perfect for DIY projects, repair, and decoration of leather items