Self-tapping screws are screws that are designed to tap their own threads as they are being installed.
This type of screw is typically used to thread into materials that are too thin or too soft to be tapped conventionally.
They are commonly used to secure metal or wood parts together and can be particularly useful in applications where a tight, secure fit is needed. Because they are able to create their own threads, self-tapping screws can be a convenient and efficient way to fasten two materials together without the need for additional tapping or thread-cutting tools.