Standard nails can bleed through paint or cause streaks on your stain grade work. These high quality stainless steel nails eliminate these worries. Stainless Steel nails are most often used in projects where they are exposed to weather or in highly humid areas. However, woods such as Redwood and Western Cedar have high levels of tannic acid, which can cause staining with standard nails. Pressure treated lumber can have similar problems due the chemical reaction between the copper salts used in the treating process and the commonly used galvanized nail. Using Stainless Steel nails can help avoid having to replace or refinish your project because of discoloration or fastener failure. Furthermore, stainless steel nails have a lateral strength 20 higher than ordinary plain steel nails; stiffness is about the same.