The rubber hinges don't crack/break under strain. The rubber also helps to grip the binder. Used for college. There are enough colors to have one book for each class.
I use these binder for my photos. I print two 4X6 pictures per sheet and then I can insert four pictures per plastic sheet cover.I have four of these binder and they will hold over four hundred plastic sheets inserts. I especially like how easy you can turn the pages and the pages do not get caught on the notebook rings.
I bought the binder a month ago and the rings on the inside would not close properly the rings are not adequate enough for school use I replaced it already!
this product was purchased for my 7th grade daughter who chews binders up like they were wet paper bags but this seems to have stopped that trend very durable