Expanded Metal Meshes are produced from solid sheets or plates of carbon, galvanized and stainless steel, as well as aluminum and a variety of alloys of copper, nickel, silver, titanium and other metals. Because expanded metal is made from a solid sheet of metal, it can never unravel. The metal strands forming the open diamonds permit light, heat, air, liquids and sound to pass through yet present a virtually un-penetrable barrier to intruders. Expanded Metal is an extraordinary versatile material one with thousands of uses.