Nut and Bolt Thread Checker (Complete SAE/Inch and Metric Set)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>23 of the most common SAE and 21 of the most common metric sizes， see description</li><li>Each included size has a nut and bolt checker on the same gauge.</li><li>Thread sizes are permanently stamped on each gauge.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51d-y-xAplL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41U-oxcCXYL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41-WEbd1kML.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31RCsamK%2BOL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31t527xk6bL.jpg" noproxy>