These were just what I needed for my Rook piercings.  They seem well made.  I'd prefer only one ball screwed off but they both do.
I had a hard time getting them in my ears because the type of piercing makes it hard to get them in, not the earrings fault however.
When it's time to replace these, I hope to find them in white gold.  Other then that, great for Rooks when you don't want snaggly hoops.

This is the 3rd one I've bought.  These are great for rook piercings.  One I lost because I did not tighten enough, my fault.  Other than that, great product.  Exactly what I wanted.