Grip Thread Pitch Gauge MM &amp; SAE<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Use to provide the correct size drill bit， or to size fastener to determine what bit should to use.</li><li>Heavy duty gauge steel.</li><li>Measures drill bits from 1/16" to 1/2</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31IqvQZEgnL.jpg" noproxy>