Easy maintenance tools:
1) jujube wood handle.
  2) Large cable wrench, used to adjust the adjustment.
  3) small cable wrench, used to adjust the cable.
4) a word screwdriver.
5) pin wrench, used to twist the oval pin.
6) Head wrench, used to adjust the sound head position.
7) Multi-pinch hand, used to adjust the piano squealer.
8) Kappa wrench.
9) Spoon wrench, used to adjust the spoon angle.

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