Designed to check guitar neck straightness of the fretboard and not The frets. This is the only true way to check for straightness before leveling your frets. Essential for proper truss rod adjustment. .125"x1.5"x18.5" Machined Edge Aluminum. One side is for 25" long scale Paul Reed Smith and Neck-Thru Carvin Guitars, and the other side is for 24.5" short scale Paul Reed Smith guitars. Keep your guitars fret buzz free. CNC precision machined for a flatness of +/- .001" Good to use with 21, 22 or 24 fret necks..doesn't matter. Use with strings on or off. Notched to the 22nd fret with clearance for more frets and Clearance for the nut on the other end. Covers the entire length for the neck.

• Designed to check guitar neck straightness of the fretboard and not just the frets
• One side is 25" PRS/Carvin Neck- Thru, and the other side is for 24.5"Short PRS
• 6061 Aluminium- Nice Brushed Finish
• Machined Edges for Flatness / Cheaper Tools Ae Not

Designed to check guitar neck straightness of the fretboard and not just the frets