Dier-Tech. has been dedicated to the development of fixed seat products since 2013, including general fixed seat, pneumatic fixed seat, ball lock fixed seat, integrated fixed seat and discharge sleeve, etc., standard covers the mainstream market standards, such as Dayton Moeller Punch, etc. The product has very high roundness, cylinder degree, position degree and so on suitable for the quick change type, the precision one-time installation, is advantageous to raise the trial die efficiency, enhances the sheet metal stamping efficiency, reduces the installation time above 50%.