The base of this paper cutter is mae from a Heavy dutty steel to withstand years of use. * Cutting arm includes a lock to ensure safety while using. * Base has a clearly embossed grid and a ruler (in inches) for precise and clean cutting. * The Adjustable Backstop hold paper straight and steady to help avoid misatkes and ensure straight lines. * Base of the paper trimmer also includes rubber feet along the bottom for added stability while using.