1ACCURATE ADJUSTMENT: Guitar intonation tool is designed with a professional double rocking system to accurately adjust bridge tone for octave adjustment 2DURABLE MATERIALS: Guitar intonation tool is made of excellent plastic and metal materials for durability and long service life, lightweight and useful 3EASY AND FAST: The octave tuning wrench is designed to be simple and easy to use, allowing for quick tone adjustment and easy to operate for beginners 4MULTIPLE USES: The octave tuning wrench is suitable for all types of guitars and other stringed instruments, compatible with different models, useful and practical 5FUNCTIONS AND EFFECTS: Double rocking bridge guitar intonation tool can effectively improve the sound quality, enhance the playing experience, suitable for practice and performance 1 xGuitar Intonation Tool