I really like this curtain double rod, my husband works night shift, so before this I had just stapled dark sheets under my black out curtains, then stapled them to the wall to make the room dark during the day.  This is a much better alternative!  It took me a little bit to figure it out when I got it, partly because I couldn’t find the hardware..  it was taped inside the box so it didn’t fall out..  I didn’t open the box enough to see it. Anyway, after I found the hardware it was an easy install.  I really like that it slides in to the holder piece, so it’s secure, but easy to remove if you want to change out curtains or wash them!  I would highly recommend this to anyone that likes their room extra dark!