Features 1、Internal External Grinding Process: The correction tool adopts the internal and external grinding process, which greatly improves the hardness and wear resistance. 2、Precise Grinding Treatment: All the end faces of the knife calibration device are accuracy grinding treatment, which can ensure the overall accuracy of the tool holder, so as to ensure the accuracy of measurement. 3、Production Inspection: This is a non corrosive calibration tool, with multiple production inspection procedures and quality assurance. 4、Portable Design: The balance chuck is small in size, light in weight, easy to use and easy to operate, which brings you more convenience. 5、Wide Applications: The chuck has a wide range of applications and can be used in drilling, grinding and lathe machining centers. Specification Item Type: Balance Collet Chuck Material: 20CrMnTi Accuracy: Approx. 0.005mm / 0.0002in Carburizing Depth: <0.8mm Dynamic Balance: 25000rpm Package List 1 x Calibrator