A blacksmith is a person who works with metal, particularly iron or steel, by forging, shaping and hammering it into tools, weapons, utensils, etc. Blacksmiths use various tools such as hammers, anvil, tongs, punches, chisels, and bellows to heat the metal before working on it. They are also skilled in making locks, keys, horseshoes, nails, and other hardware items. The term "blacksmith" comes from the fact that they often work with hot iron or steel which creates soot or smoke, turning their hands and clothes black while performing their craft.