Crafted from high-strength steel and stainless steel, ensuring and rust resistance for long-lasting performance. Portable design allows for easy transport and storage, enabling piano maintenance anytime, anywhere. Compatible with upright pianos, grand pianos, and large concert hall pianos, meeting diverse tuning needs without compatibility issues. Ideal for music professionals and enthusiasts at all levels, including beginners, piano tuners, and piano teachers. -made tools are hand-finished and calibrated for accurate pitch and optimal sound quality. This 9-piece professional piano tuning kit is designed to provide an exceptional tuning experience for all piano types. Whether you're a beginner or a seasoned professional, this kit offers the tools necessary to maintain your piano's sound quality. With its construction and portable design, you can easily carry it wherever you go, ensuring your piano is always in tune. Perfect for personal use or as a gift for piano lovers, this kit is an essential addition to any musician's toolkit. Color: As Shown Material: Metal+Wood Package Contents: 1*Piano Tuner Wrench kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.