Iron nails are small, pointed metal fasteners made primarily from iron. They are commonly used in construction and woodworking to join materials together, providing strength and stability to structures. Iron nails come in various sizes and shapes, depending on their intended use. Due to their composition, iron nails can rust when exposed to moisture, which can weaken their hold over time. To combat this, many nails are coated with galvanization or made from stainless steel to enhance their durability and resistance to corrosion.