Metal Stamping Punch. Alternative Series Leaf Flame Design. Customize Any Metal Blank. 1 Tool. Stamp any flat, soft metal. Use this punch to personalize metal blanks (made from non-ferrous metals such as Sterling Silver, Copper, Vintaj Natural brass and more). 5mm (3/16 Inch) design. Made of tempered steel for years of service. Use with a metal bench block or anvil and a 16 ounce flat head hammer. Hold your blank in place on a bench block using simple masking tape. The masking tape can also act as a guide to assure your design is in the right spot. Measurements: Punch is 3" in length. Design height for this piece is approximately 5mm (3/16 Inch) with 3mm width. Quantity: 1 stamp in one pattern.