I purchased and tested a 1/4, 3/8, and 1/2 HF torque wrench a couple years ago. Back when they were still being made in Taiwan. I think they are China made now. The 1/4" wrench was way off in terms of accuracy and the error changed depending on the set value tested. The 3/8" was within 10% when it was supposed to be within 4%. The 1/2" worked well and was always within the stated 4% accuracy. I kept the 1/2" and returned the 1/4" and 3/8" a few days later. I now use my 1/2" exclusively for lug nuts as a beater wrench to take wear off my high quality 1/2" torque wrench. It's great for that purpose. I compare it to my 2% accuracy beam 1/2" torque reference wrench every couple months and it has always stayed within spec. It isn't pretty, the torque adjustment threads are a bit rough, the torque setting lock knob is threaded too coarsely to be of much use for holding a setting, but it works. In my opinion, tightening lugs is what the HF 1/2" wrench is useful for. I wouldn't trust it for anything else. Set it back to the minimum level after each use and it should last a long time.