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Straightening keys and key cups that have gotten bent can be a challenge. Our
#2370 Automatic Key Hammer offers a very precise and controlled means of
applying a good sharp rap to the area of the key or cup that needs
straightening, and does so without any risk of scratching or marring the key or
its finish.

Suppose a flute key cup is sitting too high at its back side.
Insert a pad spatula between the pad and the tone hole, center the spatula over
the tone hole and press down on the key until the pad spud screw or plastic
washer contacts the spatula. Hold the rubber tip of the Key Hammer against the
back of the key and press down on the black knob. As pressure is applied an
internal spring becomes engaged and stretches until an auto release mechanism is
triggered and sends a firm, controlled blow to the key. The force of the blow is
completely adjustable from a very light tap to a really hard blow. Simply rotate
the black knob to increase or decrease blow. The tip of the hammer is fitted
with a rubber pad (approx. 3/8" in diameter and 1/8" thick) which
prevents any damage to the key. No woodwind bench should be without this tool,
we guarantee you'll never work on another student flute or clarinet again
without it.