someone was thinking when they designed these rods.  And not just for room darkening either.  I've never cared for that space at the end of the curtains that is, well, just open.  I always wished there was something that would wrap around and just look more finished.  These answer that question.  I love, love these curtain rods.  And again, I am not using them for room darkening.  Just too make my curtains look more finished and high end custom.  Thank you to whoever thought the wraparound design.  So simple and so perfect.  The simple things are often the very best!