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Amazon.com: Vencetmat Guitar String Action Gauge, String Height Ruler, Guitar Fret Rocker, Fret Leveling Guide, Buzzing Fret Catcher, 1mm Thickness, Laser Etching, High Precision Graduations,Luthier Tools : Musical Instruments
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Baroque String Instruments Gauge String Action Gauge Ruler Pocket-size Metallic Ruler for Electric Bass and Acoustic Guitar String Height & Fret Crown Height Measurement - Walmart.com
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