EK Success Tools Cutterpede, Straight Edge Paper Trimmer, Teal, Old Package Cuts full 12" x 12" paper Hidden extend-a-ruler swings out to full 15" and bends at a right angle for precise 6"x6" cutting Replaceable rotary cutting blade is also interchangeable with other cutting blade designs Cutting arm is top-hinged with a magnet to hold paper securely in place Replacement cutting mat and rotary blades available, sold separately