1PCS String Action Ruler and 9PCS T-shaped Under String Radiu Gauges Guitar Tool

Feature Fit most string instruments: Guitar luthier set is suitable for measuring string instruments such as electric guitar, electric bass, acoustic guitar, electric box guitar and so on. Simple and quick:Simply slide the string action ruler across the frets and read the measurement under the string with conversion chart of string action at 12th fret printed on one side, faster than use any other ruler, and stay parallel to the fingerboard that is much easier than trying to hold a ruler perpendicular to a rounded fret.

Specification Material：stainless steel Color：as shown in the picture Size： Understring radius gauge: 7.25 inch, 9.5 inch, 10 inch, 12 inch, 14 inch, 15 inch, 16 inch, 17 inch and 20 inch ​String action ruler gauge: 8.9 x 5.1 cm/ 3.5 x 2 inch

Package Includes 9 x Understring radius gauges ​1 x String action ruler