1、Rust Resistant: Made from excellent stainless steel, this guitar string action gauge is durable and will not rust or corrode over time. 2、Accurate Measurement: This guitar string action gauge is designed with precise markings for accurate measurements, making it easier to set up your guitar for better playability. 3、Lightweight and Compact: This guitar string action gauge is compact in size and easy to carry around. It fits easily in your guitar sleeve, so you'll always have it with you. 4、Wide Application: This guitar string dynamometer is not only suitable for guitars, but also for other stringed instruments such as mandolins, ukuleles and pentatrons. 5、Easy to Use: The guitar stringaction gauge is easy to use, even for beginners. Simply place it over the strings and adjust the height until it is at the desired level.