Carl Manufacturing CUI12238 Heavy-Duty Paper Trimmer- Cuts up to 30 Sheets- 18in.- Gray Heavy-duty trimmer is designed for the most demanding trimming projects. Trims up to 30 sheets of standard copy paper. Trimmer also cuts cardstock, artist black-core matboard, 1/8 foamboard and plastic sheets. Patented CARL locking rail mechanism holds paper and paperboards firmly in place while premium carbide blades ensure a precise, accurate cut. Adjustable magnetic paper guide holds materials on a calibrated sturdy metal base. Great for repetitive cuts. Trimmer features a handy storage compartment for extra blades and cutting mats. Includes a spare cutting mat, and straight and perforating blades.