Starrett 13C 6-Inch Double Square with Hardened Blade<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>6-inch double square</li><li>Ideal for machinists， toolmakers， and patternmakers</li><li>Hardened blade with integrated level</li><li>Head is 3-1/2 inches long; face is 9/16-inch wide</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41QxomDN-RL.jpg" noproxy>