APPLY TO - Phillips head self-tapping screws are widely used in house maintenance, woodworking, or sheet metal, can drill through thin steel plates, and are widely used in steel structure houses and other buildings.ADVANTAGE - The material is 304 stainless steel, which is corrosion-resistant, high-strength, not easy to rust, and has strong oxidation resistance. Can be used indoors and outdoors or in humid environments.Note: Please confirm the thread size and length of the screws before purchasing it.