Bests & Worsts Reviews from Amazon

I had the opportunity to accurately test this product on a torque transducer. I documented the results for others to consider. This product performed exceptionally well out of the box. Tested with a 1.5% average tolerance. Product is rated as +/- 4%. Will test again after 6 months of use and proper storage to see how well it keeps its calibration. *** Updated 8/6/2018 *** It's longer than 6 months I know 8P I've used this wrench over a dozen times over the last 2 years. I've always been careful to unload (set to zero) the wrench after each use and store in original case. I'm happy to report that after 29 months and no adjustments the test results from the wrench have NOT significantly changed and still fall within 2% +/- tolerance. ISO standards are normally +/- 4%, so the wrench is still twice as accurate as industry standards.