The CDI 1503MFRMH is a 1/2" drive micrometer-adjustable torque wrench with a range of 20–150 ft-lb (34–197 Nm). It features a dual scale calibrated for both directions, a positive lock with a spring-loaded pull-down lock ring, and easy-to-read laser-marked scales. The quick-release button ensures secure socket retention and easy removal. Accuracy is ±4% clockwise and ±6% counter-clockwise of indicated value, from 20% to 100% of full scale. Each wrench is individually serialized with a certificate of calibration traceable to N.I.S.T.