Weather Resistant Coated Tek 5 Self-Drilling Screws are manufactured from cold-heading steel and feature a #5 drill point. The unique tip design allows them to drill, tap, and fasten metal to metal objects in one operation, without the need to pre-drill. This creates the optimal drill performance and thread forming experience. These screws feature a unique finish that provides excellent corrosion resistance and lower tapping torque making them ideal for use in harsh environments.