It is an important tool for for machining in CNC machining,Its purpose to prevent tools from shank and to control,make tools vibrate which also called CNC extension rod. Especially as the CNC precision machining developing,the traditional CNC machining from 5000 rpm,6000 to 8000 rpm,after more sophisticated and efficient cutting speed will be developed to more than 20,000 turn. Such high-speed cutting, Higher requirements of sufficient seismic performances is needed carbide stamping pole must be uniform material, consistent performance of its and Precision concentric assurance to achieve such a high speed cutting operation requirements.