Rivets and studs are made of copper, rust-proof and durable, not easy to bend, deform, or fade, strong and sturdy. The surface is smooth and won't scratch your hands. Round rivets are great for repairing broken belts, leather crafts, DIY clothing, shoes, leather goods, bags, jeans, hats, jackets, dog collars, adding decorations, and so on. Double cap rivets come in 3 sizes: 6x6mm; 8x8mm; 8x12mm. 3 colors: Gold, Silver, Green, which can meet your different needs in various projects. Studs for clothing: ensure the fabric is not thicker than the rivet size. You just need to punch a hole and screw it on. It's easy to attach your favorite rivets to your projects. The storage box is compact and easy to carry; all rivets and tools are placed in a transparent storage box. 300 sets of leather processing tools and accessories come with 4 fixing tools: 1 punch, 1 rivet installer, 1 base, 1 punching plier. Color: Gold + Silver + Material: Iron Package Contents: 1 set x Rivet Press Only the above package contents, other products are not included. Note: Light and different displays may cause the color of the item in the picture to differ slightly from the real color. Measurement tolerance is +/- 1-3cm.