Knob can be adjusted at will, measurement height can be positioned at will.
Lightweight and portable design, easy to carry and use.
Size 1.2x1x0.8inch, which is perfect size for piano keys.
وصف
Measure the height of the black key.When the white key height reaches, set the standard black key height, adjust the position of the central post of the tool to make its upper end level with the outer ring, and then test the black key to be debugged in order to determine whether its height is correct.