An end mill is a cutting tool used in milling machines to shape and cut materials like metal, wood, or plastic. Unlike a drill bit, which only cuts downwards, an end mill can cut in multiple directions, making it versatile for various machining tasks. They come in different shapes and sizes, allowing for intricate designs and precise cuts. These tools are typically made from high-speed steel or carbide, which provides durability and sharpness. CNC machines often use end mills for automated cutting processes, enhancing efficiency in manufacturing. Proper selection and usage of end mills can significantly improve the quality of the finished product.