Wzxksoac 8Pack Acrylic Guitar Notched Radius Gauges Fingerboard Guitar Ruler Fretboard Measuring Tool for Acoustic Guitar

Size: Set of 8pcs includes 4 narrow radius gauges and 4 wide radius gauges in 7.25 inch, 9.5 inch, 10 inch, 12 inch, 14 inch, 15 inch, 16 inch, 20 inch . Feature: Material: Made of Acrylic so that it is stable, and widely used.Accurate, convenient, pocket-sized measuring tool. Portable:Handy when you want to check a fingerboard without taking the strings off.It's 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. Applies to:7.25 inch for electric guitars with a relatively large arc or ukulele 9.5 inch for electric guitars;10 inch for electric guitar;12/14/16 inchfor acoustic guitar;18/20 inch for classical guitars,Fit for string instruments such as electronic guitar, , acoustic guitar, mandolin, banjo etc.