Son Strummer Set of 3 Premium Luthier Tools - Tool kit includes String Action Gauge Ruler and Fingerboard Fret Protector Guards for Guitar， Bass...<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> THE #1 CHOICE FOR THE PROFESSIONAL LUTHIER: Includes double sided etched stainless steel String Action Gauge Ruler and Fingerboard Fret Protector Guards in 2 sizes. </span></li><li><span class="a-list-item"> DOUBLE SIDED FOR MULTIPLE USES: The double-sided gauge ruler features include a conversion chart of string action at the 12th fret， an accurate scale to measure string height， bridge saddle height， saddle slot depth， pickup polepiece height， fret slot depth and nut height and accurately measure other setup adjustments. </span></li><li><span class="a-list-item"> SAFELY PROTECT YOUR GUITAR: Stainless steel fret protectors in 2 sizes are specifically designed to protect the fingerboard while working on your frets. </span></li><li><span class="a-list-item"> BUILT TO LAST: Fabricated from high quality laser-etched stainless steel. </span></li><li><span class="a-list-item"> SATISFACTION GUARANTEE: 100% Money back guarantee click the add to cart button NOW! </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41oVjtRt4IL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/519k9PnxTpL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/613sZRXwIAL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51S-5-gCjcL.jpg" noproxy>