The PC-640 Cutter is perfect for tackling large jobs safely and effectively. While the PC-640 is built to handle paper up to 25.1 inches wide and 2.75 inches thick, operation is relatively simple and requires only 3 steps. Set the cut size by positioning the backgauge, next clamp down your stock by turning the manual pressure handle located on top of the machine and then simple press the cutting buttons located on the front of the machine. The cutting buttons must be pushed simultaneously and if either button is released, the cutting process is immediately stopped. The cutting process also stops if the front cover is opened ensuring user safety. There is also a key activated power switch to limit access by unauthorized users. The safe, simple to use Standard PC-640 is a great fit for any office.