25-inch Fretting Scale Marking Template for Guitars - Laser-cut-Acrylic - Popular Scale used on National(TM) and Paul Reed Smith(TM) Guitars Allows you to quickly and accurately mark necks and fretboards for fret slotting - popular scale length used on National(tm) Resonators and Paul Reed Smith(tm) Electric Guitars Also perfect for use on homemade instruments and cigar box guitars Frets to skip for diatonic (dulcimer) scale are indicated; also includes cutouts for fret marker dots Includes 24 total frets (two octaves), laser-cut from .080" clear acrylic. Acrylic this thin is rather brittle, DO NOT BEND and treat these templates gently!