<B>General Tools & Instruments 17 Square Head Protractor Review</b><P>http://tinyurl.com/m34fs77 <P><P> General Tools & Instruments 17 Square Head Protractor <P>Ground stainless steel<P>6" adjustable protractor arm<P>Permanently etched graduations for 0 to 180 degrees in opposite directions<P>It has a 3-3/8" x 2" head<P>