With the advancement of science and technology, people have higher and higher requirements on the process of various items, and the volume of the items is smaller. At this time, higher requirements are placed on the tools, especially in the processing of 3C industry. In the processing of micro holes (D3 .175 or less), twist drill has become the first choice tool; our company has the most advanced CNC grinder, the smallest can produce twist drills with a blade diameter of D0.18 or more, which can meet most of the processing needs on the market