
These torsion bars pay for themselves fairly quickly and save so much time which in my professional opinion makes these bars a more worthwhile investment for nut tightening than a torque wrench. In addition, to ensure the accuracy of the torque wrench, it must be calibrated at least once a month. Calibration is not required for these things! Just put them on your pistol and knock them off. I've tested them for accuracy with a recently calibrated truck brand torque wrench (SO) and these things do exactly what they were made to do.

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