Rings look fine however upon receipt I noticed that one ring on each set was much tighter than the others. Took a little bit of force to release it (maybe slightly cross threaded) as it was not screwed in completely so it was not just a case of being done up tight. But after resolving this, all rings function fine.
15/01/2019
Very well built. The machining is well done. Fits and screws into Nikon lenses and other brand step up rings. Wish the kit included 86mm - 82mm. I feel like that's the perfect top end ring size that should be standard with this kit!
11/01/2019