This 12-inch professional-grade rotary trimmer features a patented Luminous Paper Holder made of light-harvesting acrylic which results in more accurate cuts. The 12x9 inch metal surface includes both inch and centimeter rulers with 1/8 inch and 1mm increments. It also features grid lines and markings for some of the most common cutting sizes. The rotary blade cartridge is capable of cutting up to fifteen sheets at once and has a No-Touch replacement design that keeps hands away from the blade. A built-in compartment provides convenient storage for extra blade cartridges. Four rubber feet on the bottom help keep the trimmer in place while cutting and a molded-in carrying handle at the top makes transport easy.