This precision paper and photo trimmer has a gear driven rotary blade for perfect cuts through almost any stock or photo paper. The bright LED backlight illuminates the cutting line for completely accurate trimming. Now in a light-weight portable model with 6.5" base and 17" extending ruler. The new LED lights will shine through most paper, including photo paper, card stock, and patterned paper, but some dark or thick card stock is opaque and no light will shine through it. The CutterPillar will easily cut 5-7 sheets of 24 bond computer paper and 3-4 sheets of thicker card stock, but the more paper you cut at a time, the more you may sacrifice accuracy and precision. The Crop has measurements to cut up to 17" when the arm is extended. Requires 4 AA batteries.