CleverDelights 2" round aluminum blanks are great for stamping, engraving, crafts, and etching projects. 10 pack. 3mm hole. They may also be used as ID badges, valve tags, or countless other uses. Some edges may require some light filing for maximum smoothness and to remove any mild burring. These shiny anodized blanks have a reflective, mirror-like finish. Please visit our store for our full selection of aluminum stamping blanks.