A screwdriver bit is a small, interchangeable tool designed to fit into a power drill or a manual screwdriver. It is used to drive screws into various materials, such as wood, metal, or plastic. Screwdriver bits come in different shapes and sizes, including Phillips, flathead, and Torx, allowing them to accommodate various screw types. These bits are typically made from durable materials like steel or titanium to withstand wear and tear. They can be easily swapped out, making them versatile for different tasks. Using the correct screwdriver bit ensures efficient and effective fastening, reducing the risk of damaging screws or materials.