A drill is a tool used to make circular holes or install screws. It is equipped with a drill or screwdriver, depending on the application, secured with a chuck. Some electric drills include a hammer function. Workouts vary widely in terms of speed, strength, and size. Drill bits are used to drill holes. They are a great choice for quick projects around the house. Drilling is a material removal or cutting process in which a drill bit is used to cut a hole in a circular cross section in hard material.