Blacksmiths take bars of metal unearthed by the mining profession and work them into finely crafted arms and armor. There are many unique weapons and armaments that can only be created by blacksmiths.
Blacksmiths can create melee weapons, mail armor, plate armor and some trade items (like rods for enchanters). Blacksmiths can construct special sharpening stones and weight stones that can be used to temporarily increase the damage on Sharp and Blunt weapons respectively. Several Rods can be created for enchanters, who need the rods for more potent enchantments. Skeleton Keys can be used to open chests when a rogue is not available. Shield Spikes damage your opponent whenever you block blows. They can also create several items that are used as ingredients in other professions (such as Tailoring and Leatherworking). Blacksmithing is a good choice for Warriors and Paladins, they can benefit from the Mail and then Plate armor and the wide selection of weapons. Hunters and Shamans can also use most of the weapons made but can only start using Mail armor at level 40. Other classes can also use many weapons made by blacksmiths.