Efficient portable piano tuner - lightweight and convenient. L-shaped design, easy to use and comfortable to carry. Well made with precise thickness to tune your piano without damaging the instrument. Save your precious time - if you are a piano lover. Do you often find it difficult to play a grand piano? These L-shaped piano keys can definitely help you. Helping you simplify all steps. Save your valuable time. L-shaped design - The L-shaped design of the adjusting hammer is more in line with artificial body science. More comfortable to hold. No hand pain caused by long-term adhesion. HIGH QUALITY DURABLE MATERIAL - The metal shaft of the tuning keys is made of hard steel. Wear-resistant, compact and comfortable to carry. Durable enough for long term use. Features: 3-piece set Comes with 3 tuning keys. Sufficient to meet the needs of replacement in your daily life. Or you can share it with your friends. Practical tuning hammer Designed for tuning guzheng and most small machines with four-sided openings. Lightweight and portable The keys are slightly shorter than professional keys, which does not affect the use effect, but you have more strength to use it. Note: Please measure the tip size of your device before purchasing and make sure the size of your device corresponds to the square of the key. Package includes: 3 x Square Piano Tuning Keys