Stainless steel nails are fasteners made from an alloy of iron, chromium, and other elements that provide improved corrosion resistance compared to regular nails. The primary difference lies in their material composition; while regular nails may rust over time when exposed to moisture, stainless steel nails resist rust and corrosion, making them ideal for outdoor applications like roofing and decking. In addition, stainless steel nails are especially beneficial in coastal environments where salt exposure can accelerate corrosion.