3X Guitar Neck Serrated Straight Edge Luthiers Tool for Gibson 24.75 Inch and Fender 25.5 Inch Electric Guitars3 String Measuring Ruler with Guitar and 3-String Action Ruler. Excellent accurate action measurements for string instruments such as guitar, bass, mandolin, banjo, etc. Guitar neck fluted straight ruler - made of stainless steel, rust-proof, durable enough for long-term use. Size: 16.5x1.45x0.15 inch, double scale design, works well with most guitars, specially fit for Gibson(24.75 inch) and for fender(25.5 inch) electric guitarsRuler-made of high-quality plastic, the ruler is double-sided, there is a fraction on the back, decimal, metric conversion chart. This guitar string can measure string height, bridge saddle height, saddle seat depth, fret slot depth and nut height, and accurately measure other settings. The beveled neck ruler measuring string is designed to check the guitar's neck, fretboard straightness and frets. Fritz ruler is used to measure: nut/cord/bridge/pickup post/saddle height Plus saddle socket/fret slot depthAn excellent tool for luthiers and a must-have for any guitar technician or guitarist who wants to care, maintain, and repair their instrument. SpecificationsGuitar Neck Ruler:Product Size: 41.8x3.7x0.4cm / 16.5x1.5x0.15inchSuits for Gibson (24.75inch) and for Fender (25.5inch)