This item is a fingerboard height gauge for guitar and bass, perfect for obtaining accurate action measurements for electric guitar, bass and acoustic guitar. It is an useful and measurement for musicians to correct the height of the fingerboard. Features - Color: Silver. - Material: Aluminium. - Size: About 42 x 3.8 x 0.3 cm. - Guitar straight with dual scale design. - Easy to operate: By sliding the notched grooves of the straight until they all set flat against guitar frets, we can see if your guitar neck is straight or needs adjustment. - Accurately determine the local deformation of the fingerboard or nut. - Fit most kinds of string instruments like electric guitar, Bass , acoustic guitar, etc. - Made of aluminium which is stable, durable and widely used. Package list: 1 x Fingerboard Height Gauge