1. Materials: All snap button, snap fastener, crimp base, hollow punch and tools are made of high quality metals, then plated in other colors. We have also prepared a hammer to make it easier for you to install the snaps. They are durable and you can use them for a long time^2. Size of Snap Buttons: Sewing snap button contains 4 pieces (2 caps, one bolt and one socket); And the plug measures approximately 12mm / 0.47inch in diameter. 4 colors: gold, bronze, matte black and silver, 30pcs per color^3. Snap Fasteners: The 120 sets of metal snap fasteners: 1 universal base, 1 hollow punch, 2 models to install, 1 hammer, 1 transparent storage box. Snap button pliers with 4 colors of, 30 buttons in each color.Color: gold, silver, bronze, gun black^4. 5 fixing tools: with 4 fixing tools and 1 hammer, which makes installation more convenient and efficient; The punching tool will help to punch holes in the target products, then hammer and push the snaps on both sides, the snaps are made of good quality copper. If you don't know how to install the button, please see the detailed steps in the manual^5. Wide Applications: Widely used for leather crafts, handbags, clothing, leather bracelets, jackets, jeans, backpacks, women's bags, shoes, all other sewing project, etc^