The Wrench is made of high quality stainless steel with a wooden handle. It is sturdy, durable, comfortable to hold with a long service life. The unique L-shaped design makes it easy to to use. The piano tuning allows you to tune the piano without damaging the strings. Effective Band: The 100 cm long instrument tuning key is made of soft wool. Working with other tools, it cuts two octaves at once without fraying the strings. The effective piano tuning tool can save you a lot of time. Stable Mutes: 2 mutes with handle and 4 long taper mutes are made of high quality rubber. It has excellent elasticity. And it does not deform after being squeezed, while having good running performance. Tuning for professional piano can achieve piano tuning very well. Convenient and Economical: With the Piano Tuner Tool, you can do piano repair work yourself without waiting for a repairman to arrive. And piano tuning lets you learn new skills and save money at the same time. piano allows you to learn new skills and save money at the same time. Widely Used: The Piano Tuning Key is a perfect kit. The piano tuner tool is ideal for apprentices, students, teachers, trainers, professional piano tuners or anyone who wants to learn to tune a piano."