Features: 1 Small and exquisite, easy to carry, beautiful use, solve the trouble of running trouble. 2 The inside four corners of the guzheng universal spanner is of high accuracy and is very suitable for beginners and teachers. 3 The wooden handle is made of pure solid wood with fine texture and comfortable handle. 4 Tuning hammer with wooden shank is for ease and comfort while doing mute job. 5 The metal shaft is made of hard steel, abrasion resistance. 6 L-shape design, easy to use it, convenient to carry it. 7 Specially designed for tuning guzheng and most machine devices that have quadrilateral openings. Specifications: Suitable for:Piano,guzheng Material:Wood palstic,metal Size:17x2cm/6.7x0.8" Feature:Portable,lightweight,easy to use Color:Brown Weight:0.08kg/0.17lb/2.8oz Package included: 3x Square Shape Piano Tuner Spanner