Precisions Measurement : This digital guitar string action ruler is made from high precisions aluminum alloy, ensuring accurate measurements. Ideal for professional guitar makers and repair technicians in workshops or on site use, it solve the issue of traditional wooden or tools deforming over time. Easy to Read Display : The built in digital screen allows users to quickly read string action data without repeated checks. Perfect for music teachers and performers who need fast instrument adjustments during rehearsals or , saving valuable time. Versatile Application : Suitable for measuring string action on folk, electric, and classical guitars, as well as other string instruments. Provides a for both hobbyists and professional music shops, making instrument maintenance effortless. Lightweight & Portable : The aluminum alloy construction ensures the tool is both lightweight and sturdy, easily fitting into a tool bag. Great for traveling musicians who need to make quick adjustments before . Wear Resistant Design : The resistant aluminum alloy structure prevents rust and wear, eliminating the need for frequent replacements. A practical tool for instrument repair technicians and collectors.