Drilling and Holemaking covers the fundamental processes used to create and refine holes—one of the most common features in machined parts. These operations typically involve multi-point cutting tools, such as twist drills, which remove material to form a cylindrical opening. Beyond simple drilling, holemaking includes a range of secondary processes like reaming, countersinking, counterboring, and tapping—each used to improve accuracy, surface finish, or add threaded features. Because holes are critical for assembly, alignment, and function, understanding the tools and techniques used in holemaking is essential for achieving reliable, high-quality results in both manual and CNC machining.