Paper Trimmer is a 6 x 12-inch trimmer that includes one cutting blade and one scoring blade. The transparent cutting rail ensures straight cuts and accommodates both gray cutting blade and cream scoring blade, with room to store up to two at a time. There are easy to read measurements in both English and Metric units on the trimmer base. Rubberized feet ensure the trimmer will stay in place while in use. The extension arm on the left side of the trimmer can be left closed to cut paper up to 6 in. wide or open to measure paper up to 17.25 in. When closed, the extension arm clicks into place to remain secure.