CashBeat Guitar String Action Gauge Ruler, 1mm Thick Stainless Steel, Precision Markings, Fret Rocker Tool for Luthiers, Identifies Uneven Frets, Fixes Fret Buzz, Essential Setup Accessory. Precision Fret Leveling Tool: CashBeat's guitar string action gauge ruler is a must-have for luthiers, guitar technicians, and passionate players.
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