304 Stainless Steel Self Drilling Screws

304 stainless steel self drilling screws are almost always made out of hard steel or some metal that has been treated to increase its hardness (such as 304 stainless steel). Always make sure when using self drilling screws, the material you drill into is softer than the screw material itself. Otherwise, the screws drilling tip will dull and not cut into the material. All self drilling screws are also self tapping by the nature of how they work.