Don't bother.  These are cheaply made and crooked.  We bought them for both a three piece towel rack and 3 sets of 6 for wine.  They come with incredibly  cheap hardware so we had to go get bigger ones for the wine bottles.  Once you added all the parts on they started to skew to the right after the third set.  By the sixth one it was quite obvious.  I'm looking for something else, but not on wayfair.  These are cheap, poorly made, crooked and not worth the cost.