This is the second time I've come back to buy one of these binders. I like them because the fit and finish are high quality (i.e. the D-ring elements make a flush and smooth ring when in the closed position). Also conveniently the binder is not difficult to open as some binders I have used. Another feature that I like is that the outside of the binder has a sleeve where I can write the subject matter that is contained inside on the spine and easily see it from across the room. I'm sure I'll be buying more!
Staples has the best Heavy Duty Binders. They are sturdy dependable and big enough to put all my family group sheets in for my genealogy. I wouldn't want to have anything but a Staples brand of binder. I have tried others and they just don't hold up and compare to the quality of the Staples brand. They come up many colors or you can just get plain black or white but regardless what color you choose you can bet that you will take home the best binder that your money can buy. I have used them for years now so I know from experience that these Heavy-Duty ones hold up longer.
We use these binders frequently in our Genealogy Library. We have family genealogies filed in them and military information on our local veterans. They are very handy for large projects.