A drill bit is a cutting tool used to create cylindrical holes in various materials, such as wood, metal, or plastic. It is typically attached to a power tool called a drill, which rotates the bit to perform the cutting action. Drill bits come in various shapes and sizes, designed for specific tasks, including twist bits, spade bits, and masonry bits. The material of a drill bit can vary, with common options including high-speed steel (HSS), carbide, and cobalt. Each material offers different levels of durability and heat resistance, making them suitable for different applications. Proper selection of a drill bit is essential for achieving the desired results efficiently.