Nut and Bolt Gauge ， Metric， UNC， UNF， with Thread Pitch on Back *(3 Colors to Choose From in Listing)* (RED)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Quickly use to size bolts， nuts， drill bits， and thread pitch</li><li>Durable Hard Plastic</li><li>Two Ruler Sides Marked with Standard and Metric</li><li>Nut Posts Handle Both UNC and UNF</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51CAklTvW3L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51kiTUTYxCL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41yn5RAYTNL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41-2WKPr67L.jpg" noproxy>