Center Drill for High-Speed Steel Large Spiral Groove Center Drill

Center Drills (formally known as Combined Drill and Countersinks) are specialized short, rigid tools designed to create a precise conical seat (countersink) and a pilot hole at the exact center of a workpiece end. Their primary function is to provide an accurate starting point and guiding feature for subsequent machining operations, ensuring alignment and concentricity. In simple terms, they "find and secure the center" for precise rotational work.