This had multiple issues but not enough for me to return it. 

1. The directions are wrong. It’s a 3/16 hole you need to drill not a 1/16. 
2. I don’t know if my wall is crooked or the piece is, but it does not lay flush on both sides. 
3. It’s smaller than I thought it would be and doesn’t hold a book even on the largest shelf. (This parts my fault I’m sure it explained that)