Introduction: Simple Ruler Box Knife

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Need to cut a box? don't have a box cutter? scissors won't do? then try the simple ruler box cutter.

Step 1: Materials and Tools

You will need
-A ruler (plastic is best)
-Scissors. (for making serrations) 

Optional
-PVC tap (for a grip)
-Nail file ( for sharpening serrations)

Step 2: Cutting

Using the scissors cut into the side of the ruler.
If using a nail file first make a small notch with scissors then file away.

Step 3: End Result

After about 1 minuet of work the following result was achieved

This ruler will now cut boxes fairly quickly and effectively.