KEYSTONE is a subsidy of ZENZON TECHNOLOGY (HONGKONG) LTD，established in Kunshan in 2013. The HQ ZENZON，established in 2001， is a professional distributor of many world-famous brands in measuring industry，after years of experience and technical accumulation，the company decided to build own equipment，so Keystone was born. Keystone has been highly focused on precise and high resolution measuring equipment and is a leading supplier of varieties of measuring systems or devices such as Coordinate Measuring Machine（CMM），Optical/Vision/Video Measuring Machine（OMM/ VMM），Video Microscope（CCD）， Customized Automation Equipment solution and Fixtures in China.