Awesome rod.... so easily to install.  Bought it for sheers and works great for the grommet curtains I got.  Like all grommet rods, still had to run tape over the joint so grommets slide over easy.  Though I didn't get it for a blackout rod.... I suppose it would work as it snugs close to the wall.  I had a window that was 2" from wall on one side and so needed this type of rod to make curtains work.... and it works great.... grommet curtains slide open around both sides.