Currently in the college nursing program and it saved my life. When I need to print documents or receive documents from my professors, I can use this hole punch. Depending on the thickness of the paper, I can usually go through all of them. The maximum I could do at once was 21. Although it was a bit difficult to get them all into sections to put in, the puncher was able to punch through them all with no problem. With index cards, cards, or something similar in thickness, I can usually get 5 to 10 at a time with no problem. If I try any harder, I can't even come close. Fits in my backpack and has definitely made a lot of friends thanks to this hole punch.