rivets and studs are made of free copper, rustproof and durable,not easy to bend, deform and fade,strong and sturdy. The surface is and 't scratch your hands. tubular rivets are good for repairing broken belt, leather craft, DIY clothes, shoes, leather , bags, jeans, hats, jackets, pet collars, adding ornaments and so on. Double cap rivets have 3 sizes: 6x6mm; 8x8mm; 8x12mm. 3 colors: Gold, Silver, Green Bronze, which can cater to your different needs in . Studs for clothing: please make that your fabric is not thicker than the rivet size. Just need punch a hole and screw on. It's easy to your favorite rivets to your . The storage box is compact and easy to carry, all rivets and tools are placed in a transparent storage box. 300 sets leather working tools and supplies come with 4 fixing tools: 1 punch, 1 rivet installer, 1 base, 1 punching pliers. Colour:Gold + Silver + Bronze Material:iron Package Contents: 1 set x rivet press Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.