Notched Straight Edge soundhole These Fret Press Inserts are

These Fret Press Inserts are made of brass

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

There are four neck supports:

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

Notched Straight Edge soundhole These Fret Press Inserts areThe 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