Love these binders as I assemble training manuals for all of my classes and this style allows me to put in multiple pieces of paper and still have the books open cleanly and lie flat when the students go through them during class. We tend to flip from section to section page to page and these books allow for easy access. They are also very durable and allow for a little bit of rough handling without breaking apart and having papers go all ove rhe place! The students can keep these on their cshelves for a long time.