The C340 Precision Punch Binding System makes comb binding fast and easy! Bind up to 425 sheets of paper at a time for fast, customized bound documents. Great for presentations, training classes and more. The exclusive "paper centering system" aligns your pages for perfect punching — up to 25 sheets per punch. Plus, the built-in "paper separator" divides your stack of sheets into the right amount of pages for faster, more efficient punching. The easy-to-use, full-size punch handle also serves as a carrying handle for easy portability.