Opens with the press of the lever. Only need one hand (a thumb) to open no more tugging. If you try to open it by tugging on the rings it won't open. (Press the lever.) No worries about the binder popping open. Very high quality and well made. I'm addicted and made the switch to the "Staples Better Binder".
My daughter bought the binder for school but within 2 weeks the metal part that holds the papers disconnected from the plastic binder and could not be fixed.
I'm disappointed in the paper clasp holders. My son's used this 2 wks and the bottom ring clasp all ready won't shut. The overall quality is good but the ring clasps seem to be weak.Troy O