Jingstone was established in 1983. With the finest quality, we have sold our products over 50 countries around the world, and we enjoy an excellent reputation through 27 years. As the leading precision measuring company in Taiwan, we offer all kinds of measuring tools and equipments, including**********3.Dial indicators***** & tools***** instruments********** master gauge.***** measuring instrumentsOur products are accredited with :***** CERT ISO 9001*****/IEC 170253.Patent of Taiwan4.Patent of Germany5.Patent of US6.Patent of UNAll Jingstone products are made in Taiwan, processed strict Quality Control, and 100% calibrated by Jingstone Calibration Center.