this is a very useful product especially for people who intend to make copies of documents that will be kept in folders....saves time from having to use a punch and the holes are precise rather than off center as sometimes happens with using a home device. I always buy this product for any copies I have to keep.....
I mean it is paper that is pre-punched. I don't know what there is to say. It didn't jam my printer and saved me time from having to punch holes myself. It served my purpose.