The Hillman self-drilling screw is used in wood, fiberglass, and metal, and it possess a drill point enabling it to drill its own hole in thin gauge steel. The sharp threads create their own mating thread when drilled into the material. No pre-drilled pilot holes are necessary. MULTI-MATERIAL FUNCTION: These Hillman Screws are ideal for use in wood, fiberglass, or metal SELF-DRILLING POINT: Together, coarse screw threads and a self-drilling point design eliminate the need for a pilot hole PHILLIPS DRIVE: Use a Phillips screw driver or bit for centering upon installation DURABLE: The steel material offers longevity and reliability
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