Notched Straight Edge soundhole That is the spaces between

That is the spaces between the strings are equal not the spacing between centers

01mm accuracy

The cutting depth is adjustable by the brass thumbwheels

These Fret Press Inserts are made of brass

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

Notched Straight Edge soundhole That is the spaces betweenThe 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