You can use this to hold open your book when you are reading. I made this because I didn't like holding open my book during class or on my own. You can use on a wide verity of books. This is a great product to use when you are reading in class, at home, and on the go.
You use it by placing one of the circle on the page then with the little rectangle thing going down place that on the back of the book then place the other circle over they other page. Easy to slip over any book or pages.