I dont what the guy below me is talking about, they never come loose all you need to do is tighten it with a wrench and it stays. It did leave a mark on my derlin bolt but faint and I mean very faint, the mark was 1/6 the size of the stock detent's mark.
Conclusion:
This isnt a must have upgrade but sure is good and looks way nicer. So if your stock detent breaks or something dont buy a new one to replace it buy an eclipse one.
