For heavy industrial use this high capacity trimmer cuts up to 30 sheets of paper at once. Ground circular blade enclosed in plastic housing is self-sharpening and cuts in either direction. Features an automatic see-through paper clamp metal base with pre-printed guides for precise cuts and a thick-walled aluminum guide rod. Adjustable backstop fits on either side. Can be wall mounted. Handles mat board and other rugged materials. Optional mounting stands available for models D446 and D448.