GNJ series of high precision torque wrench tester ranges from 10N. ... and the accuracy class is in 0.3 level. ZhunDa GNJ series of high precision torque wrench testers have the following ... ,12.5,20 Transducer revolving combined typeGNJ30030-300GNJ50050-5001250mmGNJ1000100-1000 GNJ series of high precision torque wrench tester