These are the cheap torque wrenches that you can find on port charters and will save you about $9 buying this set versus buying them individually in the store. They work well if you don't plan on using them that often. When you're done, loosen them so the spring doesn't stretch and they don't lose their strength quickly. Calibration costs more than each button, but you can find video instructions on how to calibrate it yourself. I've used all three and they do their job well, but I don't plan on using them more than a few days a year so didn't want to spend a lot more on a set. Those 3 give you a good range so you can do your best to work in the middle of each wrench's torque range where they are more accurate. I've used all three on my recent brake work and have been happy with their performance. Of the three I received, only one came with a key in a plastic bag along with a pouch of silica gel and some paperwork, including a certificate of calibration. The other two only had wrenches in their suitcases, along with an outer paper envelope. Contacted the seller, he assured me they are new.
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