
I haven't tightened them much yet. They seem a bit cheaply made. On some of them the drive side flats do not line up with the drive side flats. In 40 years of using hand tools I have never seen the front flat side mismatch with the back flat side. It makes sense to me that if they can't pay attention to such details due to the quality of the steel and the manufacturing process, that might raise suspicions as well. I don't expect too much from these things and won't use them heavily unless absolutely necessary. I can't talk about strength because you never know how much something can hold before you break it. You will work for what I need.

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