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A self-drilling screw, also known as a Tek screw or self-tapping screw, is a specialized type of screw that can drill its own hole and create internal threads as it is being driven into the material. It is designed for fastening materials such as metal, wood, or plastic without the need for pre-drilling a pilot hole. Self-drilling screws feature a pointed or drill-like tip with flute-like cutting edges. These cutting edges allow the screw to cut through the material while forming threads, eliminating the need for separate drilling and tapping operations. The threads on the screw shaft provide excellent holding power and ensure a secure fastening. Self-drilling screws are commonly made of hardened steel or stainless steel to provide strength, durability, and resistance to corrosion. They are widely used in construction, metal framing, roofing, HVAC installations, automotive assembly, and other industries where fast and efficient installation is required.