**String Action Gauge Ruler - Precision Guitar Height Measuring Tool for Setup & Repair (Guitar, Ukulele, Bass, Banjo, Mandolin) - Perfect for Luthiers & Musicians**

HOW TO USE? 1.Tune your guitar. This ensures the right tension is applied to the neck. 2.Make sure your neck is straight and adjust your truss rod needed. 3.Rest the ruler or string action gauge tool on the 12th fret. 4.Read the ruler from the bottom of the string. 5.Repeat this for any other string on your guitar you need to measure. Features: 1.Fit for electric guitar, Bass , acoustic guitar,mandolin,banjo,etc. 2.With conversion chart of string action at 12th fret printed on one side. 3.With scale for string height, for ridge saddle slot depth and for nuts saddles and pole pieces. 4.Made of stainless steel which is stable,durable,beautiful and widely used. 5.From inch fractions, to inch decimals, to metric in increments. Specifications: Material: Stainless Steel Color: sliver Application: electric guitar, bass , acoustic guitar etc. Unit: mm/ in Scale for string height: 0.01-0.14in / 0.25-3.50mm Scale for bridge saddle slot depth: 0-0.875in / 0-20mm Scale for nuts saddles and polepieces: 0-0.75in / 0-20mm Ruler size: 8.9 * 5.1cm / 3.5 * 2in (length * width) Ruler weight: 28g / 0.99oz Package including: 1 x String action ruler 3 x GUITAR PICKS TIPS: Properly setting up your truss rod is crucial to get right before you adjust your guitar’s action.