Check the listing for details. Solo Pro Baritone Guitar Notched Straight Edge. Condition: New. Listed at 36.88 USD. This specially designed guitar tool is used to check your guitar's neck straightness of the fretboard and not just the frets. This is the only guitar repair tool to ensure neck flatness before leveling your frets. One side is for 27″ Baritone scale guitars, and the other side is for 26.5″ Baritone scale guitars. This notched edge is CNC precision machined for a flatness of +/- .001" and can be used with 21, 22, or 24 fret necks. Notched to the 22nd fret with clearance for more frets and clearance for the nut on the other end. Features Designed to check guitar neck straightness of the fretboard and not just the frets. Covers the entire length of the neck For use with Baritone guitars Essential for proper truss rod adjustment 1/8”(3.1mm) X 1.5" (38.1mm) X 18.5" (469.90mm) 6061 Aluminum Alloy with Brushed Finish Machined Edges for Flatness Made in USA Item shown: Solo Pro Baritone Guitar Notched Straight Edge Model #: SL-LSBTNS-10 UPC: 842561004994