Guitar String Action Ruler — Portable measuring card for precise string height adjustment This compact string action ruler helps you set and check string height quickly and consistently. Designed for accurate marking and easy use, it improves playability by making action adjustments straightforward for players and technicians of all levels. Key benefits Accurate measurements: Clear, precise markings make it simple to measure string height and compare settings over time. Portable and convenient: Cardsized design fits in a gig bag or case for onthespot checks and adjustments. Universal compatibility: Suitable for all types of guitars, ideal for routine setups and fine tuning instrument action. Improves playability: Consistent action adjustment helps reduce fret buzz and make fretting more comfortable. What it does for you Speeds up setup and maintenance by delivering reliable readings without guesswork. Helps maintain consistent action across instruments and sessions. Serves as a straightforward teaching aid for demonstrating proper string height and setup techniques. Typical use scenarios Home maintenance: Quickly verify and adjust string height before practice or recording. Studio tuning: Keep consistent action settings across instruments during sessions. Music school instruction: Demonstrate measurement and setup procedures to students in handson lessons. Simple to use, lightweight to carry, and built for repeated use, this string action gauge is a practical tool for guitarists, instructors, and anyone responsible for instrument setup.