Notched Straight Edge soundhole The Fret Fingerboard Leveler has

The Fret Fingerboard Leveler has 2 precision ground flat surfaces (the narrow sides)

The jaws can be adjusted by using the thumbwheel that at the end

The cutting depth is adjustable by the brass thumbwheels

There are four neck supports:

Notched Straight Edge soundhole The Fret Fingerboard Leveler hasThe notched straight edge has become a basic tool for checking fretboards straightness. The notches fit over the frets. Our new designed notched straight edge, made of aluminum with black hardened surface, lighter and more accurateFlat accuracy + . 0008"(0. 02mm). Two edges are notched for different guitars, it works on Fender, Martin, Gibson, 25" Paul Reed Smith and Dobro scale and other guitars. Length 16 1 2 " (420mm) Width 1. 45" (37mm) Thickness