Jiayouy 4Pcs Multi Function Metric String Action Gauge Measuring Tool for Acoustic Guitar Bass String Instruments

String ruler: Product material: PVC Size: 54mm×85mm×1mm Product use: measure the chord distance Applicable : electric guitar, folk guitar, bass etc. Pocket-sized with multi use on both side. With Conversion Chart of String Action at 12th Fret Printed. Fritz ruler Product material: PVC Size: 54mm×85mm×1mm For use on various guitars such as gut guitars, electric guitars (raise or lower string height), acoustic guitars, and bass guitars (including six string bass guitars). The reverse side is for string spacing adjustment. Package List: 2 * String Pitch Ruler 2 * Fritz ruler