I have bought these for several years. On this last purchase I found that they have changed the rings to meet with a wavy line rather than the prong and hole joint. I prefer the prong and hole system and that is what is shown in the online pictures. Nevertheless they appear solid
I love the mechanism on the Better Binders -- it's much easier on my wrist than the standard ones. So much so that I bought a 2nd Pink 2" Binder to match the one I already have!