help punch a hole through different kinds of materials, whether it is wood or steel. They come in varying lengths, shapes, and sizes to ensure it can drill the right hole diameter and shape. However, you can not just use a drill bit on its own. They are typically attached to a power tool like a drill. The drill will then provide the power, speed, and rotation needed by a drill bit to cut a hole. Drill bits can be made from carbon steel, high-speed steel, cobalt steel, tool steel, and solid carbide. They also have different coatings or finishes. Black oxide is one of the most popular and cost-efficient. It protects the drill bit from corrosion and ensures the drill bit can withstand stress and tempering. Bronze oxide, on the other hand, helps increase the stress durability and tempering of a bit. Lastly, titanium nitride is the most expensive because it makes the dit harder and adds a thermal barrier.