Efficient Portable Piano Tuner - Lightweight and comfortable. L-shaped design makes it easy to use and convenient to carry. Well made with exact force to tune your piano without damaging the instrument.Save your valuable time - If you are a piano lover. Do you often have trouble getting started with a grand piano? These L-shaped piano keys can definitely help you. Helps you simplify all the steps. Save your precious time.L-shaped design - The L-shaped design of the adjustment hammer is more in line with artificial body science. It is more comfortable to hold. Doesn't cause pain to hands due to sticking for a long time.Premium and durable material - The metal shaft of the tuning key is made of hard steel. Abrasion resistance, small and exquisite, convenient to carry. Durable enough for long time use.