Guitar Ruler String Action Gauge Tool for Electric Bass Acoustic Mandolin Banjo (Ruler)

With scale for string height, for ridge saddle slot depth and for nuts saddles and polepieces. Faster to use than any ruler, and stays parallel to the fingerboard-much easier than trying to hold a ruler perpendicular to a rounded fret The gauge features a progressive string height scale: simply slide it across the frets and read the measurement under the string With conversion chart of string action at 12th fret printed on one side.Long lasting etched printing, the printing will not wear off from long use. If you have any questions, please contact us. We provide good service.