Designed for Both Professionals and Beginners: This comprehensive kit is perfect for piano technicians, music schools, and hobbyists looking to fine-tune their piano tuning skills. It includes everything needed for both grand and upright pianos. High-Quality and Cost-Effective Manufacturing: Crafted by expert manufacturers, this kit offers exceptional value with its fine craftsmanship and dependable quality. It's designed to withstand the rigors of regular use while maintaining tuning precision. User-Friendly with Tuning Software Compatibility: Achieve professional tuning results at home. This kit works seamlessly with popular piano tuning software, allowing even novices to expertly tune their pianos with ease and precision. Innovative Octagonal Tuning Wrench: The included wrench features a versatile 2-head, octagonal design, specifically engineered for easy access and adjustment of piano's corner shaft nails, enhancing tuning efficiency and comfort. Material: Metal. Color: As shown. Package Contents: 1 x Piano Tuning 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 to be slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.