Exquisite details design: adjustable harp hammer with loop end design for more stable and keep it in line. Tuning Tools Included: You can use a wrench to adjust the tension of the string by turning clockwise or counterclockwise. The high-quality stainless steel crank and wooden handle material ensure durable and long-lasting use. Function: according to it, this piano tuning key is warm with a pleasant tone. Application: The sound rings and can fill the whole room. The shorter the thrust, the higher the tone you will get. Specifications: Material: Stainless Steel + ABS Valve: As the picture shows Package Weight: approx.250g Size: approx.16 x 3.8 x 2cm / 6.29 x 1.49 x 0.78in Package Included: 1Pc x Piano Tuning Key Note: Please allow 1-2cm error due to manual measurement. Make sure you don't mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!