Self-drilling screws, also known as Tek screws or self-tapping screws, have a pointed tip that allows them to drill their own pilot hole as they are being screwed into the material.
This eliminates the need for pre-drilling a hole before installation, making them a convenient and time-saving option for fastening metal to metal or metal to wood.
Self-drilling screws are made of hardened steel and have a flute-like shank that helps to remove excess material as they are driven into the surface
They come in various lengths and are available in Phillips head.