Hillman 10 X 2-1/2 In. Self Piercing Sheeter (Polebarn Screw) screws are highly versatile fasteners designed for use with metal, wood, fiberglass, and plastic. These sheet metal screws, also known as tapping screws, feature sharp threads that effectively draw materials together to provide a secure and reliable hold. Fully threaded with a sharp point, they ensure easy piercing and fastening, making them i for a wide range of applications where durability and strength are essential. Model Number: