Polygon Manufacturing Limited is a professional manufacturer of measure tools, inspect tools, instruments, etc., such as portable Hardness Tester, measurement system of hardness tester, control system of hardness tester, VGA Visual Microscope, Torque Wrench, mini-printer and other measurement systems. We own many national monopolies, provides the high quality inspection product and comprehensive test and solution for the user. Our company cooperates with the domestic related scientific research colleague and universities and the overseas colleague company and carry out the widespread technical collaboration. We provide the solid technical support for the customer