1.The wedge type tool which is firm and durable, not easy to wear and prolong the service life 2.The quick change tool post set is precisely designed and finely ground to ensure repeatability and accuracy 3.Quick change tool holder set is hardened, with high hardness and rigidity, so it is not easy to vibrate during processing 4.The wedge type tool post set is the main accessory of an ordinary lathe, and different tool holders can be selected according to the processing requirements