Description:The package includes 1 line of guitar string measuring and 1 line of operation. 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: 16.5x1.46x0.15 inch, double scale design, works well with most guitars, specially fit for Gibson(24.75 inch) and for fender(25.5 inch) electric guitars. Ruler-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/string/bridge/pickup box piece/saddle height plus saddle socket/fret depth slot. An excellent tool for luthiers and a must-have for any guitar technician or guitarist who wants to care, maintain, and repair their instrument. Specifications:Guitar Neck Ruler:Color: Silver Material: Stainless Steel Product Size: 42 x 3.7 x 0.4cm / 16.5 x 1.5 x 0.16 inch Operation Meter Ruler :Color: White Material: Plastic Size: Approx. 8.5 x 5.4cm / 3.3 x 2.1 inch Package Included: 1 x Guitar Ne