Star Drive With Pin Security Pan Head Self Drilling Screws #14 Unusual drive style prevents conventional screwdrivers from tampering Self drilling tip (TEK-3) 410 stainless steel is corrosion resistant and heat treated to be harder than standard stainless steel Commonly used for: public restrooms, gutters, food prep areas, processing areas, license plates, and boats Star drive with pin pan head self drilling screws are best used for metal to metal or metal to wood applications. These screws are most commonly used in public restrooms, gutters, food prep areas, processing areas, license plates, and boats. Used for securing materials from being tampered with.