I bought the pk ring and it shatter into pieces when
i put it next to my m5 30 bucks down the drain
Well, there's your mistake.
Sorry.
I have a few rings. The first one I got was a Vortex just as it was a cheap price and was basically being sold to get rid of it. It broke the first time it fell over a foot.
This made me pretty cautious with my subsequent rings. However, after accidentally dropping my SMM and Blacks magic rings a few times from over a meter and onto hard surfaces with no noticeable damage, I eased up a bit on the caution.
Recently, as I have extra, I started dropping my SMM ring repeatedly just to see how much it could take.
Took a few drops, but it cracked. Oddly enough it did not split into two, as it only broke in one spot. As such the ring is still usable.
I can spread the break open enough to see that it goes all the way through, but the ring is still one piece.
Not something that usually happens with magnets.