This is a wonderful new device that should fulfill the binding needs of most small or medium sized offices. The binding machine is capable of punching up to 25 sheets of 20 lb paper at once, and it can bind booklets which are up to two inches thick (approximately 450 pages long). This machine has brand new auto-centering technology that can help save you time because you won't need to fiddle with the paper edge guide before you punch your paper it will be perfectly aligned every time you punch. And this machine also has a document separator that assists you in determining the right number of sheets you can punch. This is a great feature because it'll help you punch as many sheets as possible per lift, but not so many that you'll jam up the machine and then have to spend time cleaning up the mess. The binding machine is very user friendly and utilizes push button technology for easy operation, plus you can use either plastic combs or GBC ZipBind spines, so you have a couple of different binding options.