Posted by Renee Schmidt

A new ruler replacement:  if you use a traditional ruler, it’s time to throw it out.  Designed by Giha Woo, the Constrained Ball is a new drawing aid that, once attached to a pen, will let you draw straight lines without using a ruler. 

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The Constrained Ball uses a small wheel to direct your pen in a straight line.  Stylish and functional –it’s a win.