AP series: The most unique innovative value of the " Large Thru-Hole Air Chuck " is the comprehensive improvement of the air injection method used by the original industry products, and the development of an innovative Air supply system. The Air supply system has improved the problems of time-consuming and difficult installation of the traditional pneumatic chuck using the gas distribution ring, fast wear of the sealing ring, and high maintenance and replacement costs, greatly improving the user's production efficiency and reducing costs. Air supply system is the first in the industry, and the product has successfully obtained patents in Germany, Japan, European Union , Italy ,China, Taiwan, US.