A paper cutter or paper trimmer (sometimes called a “guillotine”), is a tool used to cut paper with a straight edge. Entry-level office paper cutters can cut up to ten sheets of 80gsm paper at a time. There are also larger paper cutters available as well as heavy duty industrial ones used in printing environments. If you making your own invitations, business cards, flyers etc. then a decent paper cutter is an invaluable tool. I prefer a thin blade cutter over the thick plate office cutter as I find it to be more accurate. Paper cutters can also be used to cut thin pieces of magnetic sheet.