Double-Sided Guitar String Measuring Ruler with a conversion table for the 12th fret top string. It enables precise measurement of string saddle height, string height, saddle nut height, fretwire height, and nut height. Portable and lightweight: its compact size and light design make it easy to carry. You can measure strings accurately anytime, anywhere. Comprehensive measurement: the double-sided ruler includes conversion tables for fractions, decimals, and other units on the back, offering convenience and ease of use. Fast and accurate: enables quicker and more precise measurements, saving time and ensuring precise adjustments for optimal performance. Use scenarios: - Setup a new guitar or after a nut or saddle adjustment to verify string height and slot clearance. - Routine maintenance or after refrets and string changes to confirm frets, saddle, and nut heights are correct. - On the go during gigs or practice for quick checks of action and setup before playing.