Description: Luthier tool set including 9 understring gauges, fingerboard fret protector guards ,guitar grinding stone and double side string action ruler and 32 Leaf feeler gauge metric. Fit for electric guitar, bass and acoustic guitar repairing and installing tools set. Suitable for guitarists and luthiers. Specification: Material: Metal Size Chart: Under String Guages size: 7.25" 9.5" 10" 12" 14" 15" 16" 17" 20" String Action Gauge Ruler Size: 90x50x0.5mm / 3.54x1.96x0.01inch Package Includes: 1 Set 9 Understring Gauges 1 Piece Guitar Grinding Stone 1 Piece Double Side String Action Ruler 1 Set 32 Leaf Feeler Gauge Metric 1 Set Fingerboard Fret Protector Guards 1 Set 32 Leaf Feeler Gauge Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.