Metallics Self-piercing drywall framing screw featuring black phosphate finish offers added corrosion resistance while enhancing the life of the metal. It measures 7/16-Inch x #6 Dia. This screw features pan type head. It has Phillips type driver. Drywall framing screw is suitable for use in up to 20-gauge steel stud. It is perfect for light-duty steel and aluminum metal-to-metal applications.