Ideal for all kinds of trimming needs, this trimmer is perfect for frequent use. A heavy-duty bypass blade makes crisp cuts through up to five sheets of paper at once, and the self-sharpening design makes this trimmer a low-maintenance alternative to other trimmers that need blades replaced frequently. Best of all, a longer base accommodates 8 1/2" wide paper, with up to a 9" cut length. A permanent scale and grid cutting mat helps ensure cutting accuracy, and a paper clamp with smudge guard holds your material steady without leaving fingerprints. Lifetime warranty.