Our rivets and studs are made of nickel free copper, rustproof and durable,not easy to bend, deform and fade,strong and sturdy. The surface is and 't scratch your hands. Our 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 size. Just need punch a hole and screw on. It's easy to add your favorite rivets elements 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 installer, 1 base, 1 punching pliers. Colour:Gold + Silver + Bronze Material:iron Package Contents: 1 set x press Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.