75 Pack, #12-14 x 1.5", Hex Washer Head Drill Point Roofing Screws, Provide Secure Metal To Metal Fastening With Strong Holding Power Without The Need To Pre-Drill, Engineered Drill Point & Flute Remove Material Efficiently & Properly Size The Hole For Threads, Ideal For Fastening Thicker Gauge 20-12 Gauge, Exterior Metal To Metal Where A Sealing Washer Is Needed.