This heavy-duty rotary paper trimmer safely and smoothly cuts paper up to 18" long. Simply place sheets under the cutting rail, secure the locking lever, and slide the blade handle back and forth over the sheets until all are completely cut. Patented locking rail mechanism holds paper firmly in place to ensure a precise cut. Adjustable magnetic paper gauge holds material on a sturdy, precision-calibrated metal base to make repetitive cuts easy. Includes English and metric rulers and preset measurements for common-sized items. Handy built-in storage holds extra cutting blades and cutting mats. High-quality, replaceable cutting mat can be rotated to extend useful life up to 3,000 cuts.