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What is your opinion on using a torque stick to limit torque with an impact wrench? In our shop we have been using them a few years but I often wonder how accurate they are which is why we only use them on lug nuts. Ten pounds error or maybe twenty on a lug nut usually isn't that significant. Its hard to actually measure the torque they applied to a bolt, once the nut stops turning its not much good to test it with a torque wrench since it takes so much to break them loose and turning again.