Advantage: Blank are made of solid alloy, not easy to fade, break or deform, suitable for long-term use; 3mm thicker size is more sturdy and . Each coin blanks medal is packed in a protective box to prevent the product from being scratched when transporting or making projects. Metal Blank Coins Diameter: 40 mm / 1.58inch; Coin Blanks Thickness: 3mm / 0.12 inch These metal blank coins can be laser engraved DIY various patterns or texts, turned into decorations or gifts, and given to friends, family, girl-frieds on birthdays, Christmas and other meaningful days. These blank stamp labels are perfect for making medals, commemorative coins, travel crafts, signs, bag charm, sweater chain charm, ornaments, name tags, lost signs and other metal disc. Instruction: For better stamping, you can place a metal workbench block underneath the blank stamping tags. NOTE: Please pay attention to whether its size is enough to engrave the words you want to engrave.