Easy Action Adjustment: This guitarist designed ruler provides simple action adjustment to ensure accurate string height alignment, improving performance and tonal clarity. Quick Guitar Maintenance Aid: Assists with fret standardizing and minor repairs, offering a user friendly approach to maintaining your instrument and achieving professional results at home. Good Kit: A multi instrument tool designed for guitar and bass setup, integrating versatile adjustments and a height gauge combo to function as a reliable kit. Effortless Portability: Built for long lasting accuracy with stable performance and durable construction, while its compact storage and portable form enhance convenience without sacrificing functionality. Key attributes and compatibility: Function focused tool suitable for guitar and bass setups, includes a height gauge combo for precise measurements, designed for durable use and reliable performance in varied environments. Use scenarios Home DIY setup: After changing strings, use the ruler to verify string height and perform quick adjustments for action, then use the height gauge to confirm precise measurements. Studio or workshop use: Use for neck relief checks, fret standardizing tasks, and minor repairs on both guitars and basses to streamline setup before sessions. On the go / live performances: Pack the compact tool for portable, field ready adjustments between gigs, ensuring consistent action and reliable measurements without bulky equipment.