In the initial processing technology of medical bone nails, a milling cutter is used to cut the hexagonal and plum-shaped size of the bone nail. Now it can be done with a more efficient and cost-effective process, which is to install a hexagonal punch or a plum-shaped punch with a PCM rotary tool holder. Head, go processing! The hexagonal punch can complete the processing of a hexagonal or plum blossom of a bone nail in 5-10 seconds. The service life of the special hexagonal punch for bone nails or the special plum blossom punch for bone nails. The service life of the plum blossom punch is the life of the milling cutter. 10-20 times, the efficiency of processing the hexagonal bone nail and the plum blossom of the bone nail is improved, and the cost of the plum blossom punch is reduced.