Iron Address Letters House Letter K 18" - Heavy Duty Metal House Numbers and Letters, House Signs MADE in the USA! Supporting United States craftsman. Hand crafted wrought iron, with a baked on flat black powder coating; lead free & rust resistant Long lasting wrought iron for indoor or outdoor use. Black oxide 1" #8 Phillips Pan Head Screws are included if required. Decorate your entire living environment with the elegance of wrought iron. The metal used in our wrought iron products contain alloys of .01% to .29% carbon and iron. The silhouettes are cut from sheets of this low carbon wrought iron on a laser cutter and are then hand welded if needed, or hand bent, and then powder coated. A new modern and artistic way is how our products are made; appearing very different from the well-known medieval "hammer and anvil" look popular culture is accustomed to.