... need Kingtop Office Cutting Supplies Metal Letter Opener with Smooth Shiny Shape Material Zinc Alloy, Iron, Leather, Brass, etc.ColorMetalCraft Stamping, ... your design on the mold surface, 2) Injection, metal material injected into the mold 3) Elimination, on completion of ... injection, unwanted material is eliminated to reveal the completed design 4) Polishing ...