VERSATILE APPLICATION: Suitable for measuring string movements of forks, electric, classic guitars and other string instruments. Provides solutions for both hobbyists and professional musicians to facilitate instrument maintenance EASY TO READ DISPLAY: Built-in digital screen allows users to read strings action data quickly without repeatedly check. Perfect for music teachers and players who need to quickly adjust instruments during rehearsal and save valuable time WEAR RESISTANT DESIGN: Durable aluminum alloy construction prevents rust and wear, eliminating the need for frequent replacement. A practical tool for musical instrument repair technicians and collectors PRECISION MEASUREMENT: This digital guitar string action ruler is made of high precision aluminum alloy to ensure accurate measurements. Ideal for professional guitar makers and repair technicians to use in workshops and sites, solving the problem of traditional wood and tools that deform over time LIGHTWEIGHT AND PORTABLE: Aluminum alloy construction makes the tool lightweight and sturdy, easily fits into your tool bag. Perfect for the traveler who needs quick adjustment in advance, Manufacturer: Netbiio