Features: 1.The rangefinder is made of high-quality stainless steel, which is anti-rust and corrosion-resistant, and can be used for a long time 2.The rangefinder can make necessary measurements and adjustments to stringed instruments 3.This guitar repair kit can be used to change strings, set pitch, adjust movement or check string height 4.A full set of accessories, suitable for cleaning column instrument 5.Suitable for electric guitar, bass, banjo, mandolin and various stringed instruments specification:Item Type: Guitar Tool Set Used for: Guitar Material: Metal + polished stone Product Size: Polishing Stone: Approx. 10 x 1.2 x 1.2cm / 3.9 x 0.5 x 0.5in Gasket: Approx. 7.8 x 2.2cm / 3.1 x 0.9in /1.3 x 0.1cm / 0.5 x 0in 3 in 1 Length: Approx. 12cm / 4.7in Radial Ruler s: 7.25, 9.5, 10, 12, 14, 15, 16, 17, 20 spacing ruler Scope of Application: 0.04-0.88mm Number of Blades: 32Pcs Metric Dimensions (mm): 0.04, 0.05, 0.06, 0.08, 0.10, 0.13, 0.15, 0.18, 0.20, 0.23, 0.25, 0.25, 0.28, 0.30, 0.33, 0.35, 0.38, 0.40, 0.43, 0.45, 0.48, 0.50, 0.53, 0.55, 0.58, 0.60, 0.63, 0.65, 0.70, 0.75, 0.80, 0.88 Inch Size: 0.0015,0.002,0.0025,0.003,0.004,0.005,0.006,0.07,0.008,0.009,0.010,0.010,0.011,0.012,0.013,0.014,0.015,0.016,0.017,0.018,0.019,0.020,0.021,0.022 , 0.023, 0.024, 0.025, 0.026, 0.028, 0.030, 0.032, 0.035 PackageList:9 xRadius Gauge1 xSander1 x 3 in 1 Tool1 x Measurement Ruler2 xGasket1 x Spacing Ruler NoteThere is some anti-rust oil on the feeler gauge to prevent rust, please dont worry