Akface Guitar String Action Ruler Gauge Tool Measuring Kit for Electric Bass and Acoustic Guitar<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> ★ Double sided， Imperial (inches) One Side， Metric (millimeters) On The Other. With Conversion Chart of String Action at 12th Fret Printed. </span></li><li><span class="a-list-item"> ★ Each gauge is printed with a useful decimal and metric conversion chart. It's easy to read so checking and adjusting string action will definitely be a breeze. </span></li><li><span class="a-list-item"> ★ Perfect accurate action measurements for string instruments such as guitar， bass， mandolin， banjo， etc </span></li><li><span class="a-list-item"> ★ Pocket Sized， Convenient for Taking to Everywhere You Like </span></li><li><span class="a-list-item"> ★ Ruler size:8.9cmx5.1cm/3.5''x2.0''(LxW) </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/517WXGnR13L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51vWIolh99L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41pHrKl-7uL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51-HLgBqewL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51P9ZAA%2Bw1L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51wxm5oI54L.jpg" noproxy>