[Application]: Ideal piano tuning kit for apprentices, students, teachers, trainers, professional piano tuners, or anyone who wants to learn piano tuning[Function]: Specially designed for tuning guzheng and most machine devices that have quadrilateral openings[Easy to Use]: Small and exquisite, convenient to carry it,L-shape design, easy to use it[Material]: Made of quality stainless steel and plastic; L-shape design determines that it is convenient for useFeatures:- L-shape design determines that it is convenient for use.- Small size, easy to store and carry.- As an accessory, it can be used to tune the tone of piano and guzheng.- The tone tuning spanner is made of quality stainless steel and plastic.- Durable and can be used for a long time.Specification:Condition: Brand NewMaterial: Stainless Steel, PlasticColor: As ShownInner Bore Diameter: Approx. 0.65 cm / 0.26 inOverall Length: Approx. 16.5 cm / 6.5 inHandle Length: Approx. 11 cm / 4.3 inWeight: Approx. 77 gPackage List:1 * Tuning Spanner