I bought this binder for my daughter because her school requires them to have a 3 inch binder. I found this style at Staples and recommend it. This binder is so much more durable then the others that say they are.
Within a few weeks of purchase one of the rings would not close evenly. It is currently being used at school and does not seem to hold up to the multiple opening and closing of the rings by a middle-schooler.
After having to replace a binder just 2 months into the school year we bought this one. So far it seems to be holding up well. Let's hope it makes it through the rest of the year.