What most people are after when they want a wrought iron fence is a certain appearance, like the distinctive look of wrought iron fencing in front of a Victorian house. To explain this look, you need to know something about ironwork. To start with, there are two main types of iron. Cast iron involves pouring the iron into a mold while it’s molten and allowing it to cool into a distinctive shape. Wrought (worked) iron is iron that has been heated until red hot, then pulled, twisted, or extruded into shape. These two processes used to be used to produce a variety of distinctive features in fences.