It pains me to say this, but this hole puncher is the absolute worst MAMBI product. Actually, it may their only bad product. I loved its portability, but I was unable to punch through multiple pages at a time, even though it's supposed to be able to punch up to 9 pages. It kept getting stuck and ruining the pages I worked so hard to design. I returned it an hour after purchasing it and bought the TUL punch from Office Depot instead.