Accurate measurements: Includes 1 guitar neck and string measuring ruler, 1 string ruler, and a 20 x 20 cm fiber cloth. Provides precise measurements for guitar, bass, mandolin, banjo and more. Durable and precise: A sturdy, notched straight ruler made from stainless steel. Dual scale design suitable for most electric guitars, especially (75 inch) and (25.5 inch). Versatile measuring tool: Plastic ruler, double-sided with fractional, decimal and metric conversion tables. Measures string height, bridge saddle height, saddle slot depth, fret slot depth, and nut height. Neck straightness verification: The notched string ruler is designed to verify the straightness of the guitar neck, fretboard and frets. It measures nut height, string height, bridge height, pickup pole piece height, saddle height, saddle slot depth, and fret slot depths. Bonus cleaning cloth: Includes a 20 x 20 cm fiber cloth for easy cleaning of the stainless steel ruler. Please buy in our kuylive Store for authentic products. Usage scenarios: - Guitar setup: check neck straightness, measure string height at the 1st and 12th fret, and adjust saddle height to set action. - Fretwork and nut evaluation: verify fret slot depths and nut height for precise setup. - Multi-instrument maintenance: measure on bass, mandolin or banjo to ensure consistent action and accurate measurements.