<a href="http://www.casperelectronics.com/finished-pieces/bend-finder/"><img src="http://www.casperelectronics.com/images/finishedpieces/bend-finder/_S3600015.JPG" width="300" height="400" alt="" title=""  class="alignleft"/></a>
a simple but super useful little tool that all benders should have!
Build one now. Click the image for more details and simple schematics. 