I have two NEW generic black anodized 25mm bolt-on DRM wheel spacers. One of them has a bent stud (which will need to be replaced), the other has some little gouges on the back that should not affect operation.
Backstory: I bought four of these, one of them had the bent stud. Seller sent me a new pair to replace the single one, and one of the new pair had the gouges.
Aside from that, the quality of the spacers is fine. I am running the same ones on all four wheels and everything rolls perfectly straight with no vibrations. The studs are metric 10.9 grade, and the spacer material is 6061-T6 Aluminum.
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Gouges on one:
Bent stud on the other (lower right):
What my car looks like with the same spacers on stock suspension and sport wheels: