Perforate, score and slit at the entrance of the machine not on an exit shaft to give greater accuracy. Blades change in seconds without removing any shafts or the blade mount hub. Anvil-style perf provides a burr-free, flat finish. Individually adjust the depth of each perf / score / slit independent to each other. These friction fed models use a top feeding system that virtually eliminates scuffing and allows for the machine to be loaded while running.