Dahle #552 Professional rotary paper cutters feature round circular blades that are totally enclosed in plastic housings to ensure safety. Self-sharpening blades also cut in either direction. Features automatic see-through paper clamp and adjustable backstop. Sturdy metal base has pre-printed grid lines. Can be wall-mounted. Cuts up to 20 sheets of material at a time. 20" cut. FREE Ground Shipping to 48 lower US states.