[Quality Material Luthier Tools] Stainless steel guitar gauge sets with rounded off edge, heavy duty material, rustproof and corrosion-resistant, won't scratch or hurt your hands or the fingerboard and frets | [Guitar Radius Gauge] comes in 9 sizes: 7.25 inch, 9.5 inch, 10 inch, 12 inch, 14 inch, 15 inch, 16 inch, 17 inch, 20 inch, luthier tools for Guitar and Bass Setup | [32 Blades Feeler Gauge] Steel Feeler Gauge measuring range: 0.0015 inch/ 0.04 mm to 0.035 inch/ 0.88 mm, light oil covered to prevent rust and stick, thumb screw is easy to use for blade removal and protection | [String Action Ruler] Size 8.9*5.1cm, metric & imperial, etch printing on double sides, will not fade, accurate and clear to measure string height, bridge height, nut slot depth, bridge slot depth and pickup height | [Fingerboard Guard with Grinding Stone] Prevents scratching or damaging to guitar or bass fretboard when filing and polishing frets, 10cm x 1.1cm Grinding stone for polishing saddle, nut and frets