I purchased the 6” wide shelf.  As the other reviewers stated, it doesn’t come with any mounts or predrilled holes so I knew what I was getting into.  After buying floating shelf brackets, cutting the brackets to length, centering the shelves on the walls, finding studs, pre-drilling holes in each board, breaking drill bits because the wood was so hard, and realizing the wood is much more rustic than it appears in the photos, I was angry.  These shelves took  3-4 hours to put up and I am a contractor.  Not worth it!