This guide provides an overview of the different types of drill bits available and how to choose the right bit for your project. It covers the basics of drill bit design and construction, as well as the different materials and coatings used in
From Wikipedia
A drill bit is a cutting tool used with a drill to remove material and create holes, typically with a circular cross-section. Drill bits are available in various sizes and shapes, designed to produce different types of holes in a wide range of materials. To function, drill bits are usually mounted in a drill, which provides the rotational force needed to cut into the workpiece. The drill will grasp the upper end of a bit called the shank in the chuck.