Dual-sided guitar string measuring ruler with a conversion table for the 12th fret top string. It enables precise measurement of saddle height, string height, saddle nut, fretwire height and nut height. Portable and lightweight: compact size and light construction make it easy to carry and use anywhere. Measure strings quickly and accurately on the go. Comprehensive measurement: double-sided design with back-side conversion tables for fractions, decimals and other units for convenient reference. Simple, user friendly operation. Fast and accurate: helps you perform precise adjustments more efficiently, saving time and reducing the need for additional tools. Use scenarios: - Quick setup checks on stage or in studio after changing strings to confirm string height and saddle nut alignment. - In a workshop or repair setting to verify and adjust nut height, saddle height, and fretwire height for optimal playability. - For beginners and students learning guitar setup, providing a clear, on-hand reference for accurate measurements.