I've been very happy with mine - tight tolerance, excellent chrome quality, fit well and work well. Like most flare wrenches, they are thicker to give more contact area and not round the nut.
I wondered if the other poster was confusing the brand or got a bad set or someone swapped them on a return or something. It was the first negative experience with these I have ever read.
I didn't realize my post on the flare nut wrenches would be so controversial. I wasn't confusing the brand, for what it's worth. I own these Craftsman flare nut wrenches in both standard and metric sizes, and I also own the older matte finish made-in-USA sets along with the older Craftsman Pro, polished chrome, made-in-USA sets.
Also, I meant that they're thicker in the handles. This is pretty common for cheap tools. The material is weaker and so they must make the tools thicker to withstand the same force without breaking. These actually have less contact area though, because the open ends of the wrenches make no contact with the fastener, which means in practice they're no better than a regular wrench.
Anyway, it doesn't surprise me that others have been okay with the wrenches. It's often the case with cheap tools that they're not necessarily poor quality overall but rather have poor quality control, meaning there are good ones, but also greater chance of getting bad ones.
I attached a couple side by side pictures comparing the three different styles of Craftsman flare nut wrenches. You can see in the first picture how much wider the handles are in the current version. They're also about 30 grams heavier. In the second picture you can see the current version in the bottom has larger recesses in the corners and doesn't extend as much into the 6th side as the others. In the last three pictures, I show how the same bolt looks torqued inside the three wrenches of the same size. Notice that in the first (the made-in-China version), the open-end corner on the top left doesn't even touch the head of the bolt. This is not the case with the two made-in-USA versions.
I guess I'd say, take random internet advice with a grain of salt. You can always return them if they don't work for you.




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EDIT: On my phone, it's pretty clear in the picture that the corner doesn't make contact with the fastener head, but when the app uploaded the photo, it seems like it diminished the quality of the photo to the point that it's hard to see it. I'll try to get a better one when I can get back out to the garage again.