Dong Fang Instrument Factory is a backbone enterprise of AVIC, located at Hanzhong city of Shaanxi province. It is the earliest company accepted by the State High-tech Corporation and is considered as the technology center in Shaanxi province. Now it has 237 million property and 1400 types of equipment which used to machine, heat-treatment, punching, welding, centrifugal casting, final assembling, physical and chemical testing, measuring and inspecting. Our self-research products��ZHUNDA Torque Wrench, which have been won by the national and international customers due to high precision, complete ranges of size from ***** to *****, stable performance, convenient usage, good service and awarded more than 20 patents of invention. ZHUNDA torque wrenches have been widely used in aviation, space, fight, railway, boats and ships, automobile, motorcycle, wind power, petroleum, bridge, electrical and internal-combustion engine industry etc. The designing and manufacturing of ZHUNDA torque wrench have corresponded with the International Standard: ISO6789-92, the production has obtained the MAKING ME ASUREMENT EQUIPMENT PRODUCT CETIFICATE, and also many National Invention Patents. The design, exploder, product and service of the torque tools execute absolutely International Quality Standard GB/T19001-2000, and achieve the Quality Management System Attestation Certificate, which awarded by CHINA branded QUALITY SYSTEM ATTESTATION CENTER. Now�our company have produced all kinds of torque wrench and testers. Our products mainly include: NB (D) and TW series of mechanical torque wrenches; SNB and CNB series of digital torque wrenches; ZNB series of dial indication torque wrench; YNB series of hydraulic torque wrench; NQG and NQY series of torque screw driver; NZ series of torque multiplier; TLS series of digital force gauge; NJ series of torque wrench tester *****