Self-drilling screws possess a drill point enabling it to easily drill into material such as thin-gauge steel, wood, and fiberglass. The sharp threads create their own mating thread when drilled into the material. No pre-drilled pilot holes are necessary. These screws are manufactured using #410 stainless steel for best-in-class corrosion resistance in marine applications. For indoor and outdoor projects. Stainless-steel construction. 1-1/2 in. length. Self-tapping with a fine thread pattern. Hex drive style