Self Drilling Screws Countersunk Zinc Plated Metal Fixing Windows Roofing

SELF DRILLING SCREWS COUNTERSUNK ZINC PLATED. METAL FIXING WINDOWS ROOFING. Self drilling screws have a point that acts as a drill bit and sharp cutting threads that tap the hole during installation. These self tapping screws metal are made of high-hardness carbon steel material and are suitable for steel processing aluminum and thin metal processing.