Entry from British & World English dictionary
(also wrest block)
The part of a piano or harpsichord holding the wrest pins.
- This put intolerable strains on the casework, the string tension trying to pull the wrest plank closer to the soundboard.
- A good wrest plank is vital to any piano, since it has to withstand the pull of up to 20 kg per string.
- It is used to drive tuning pins into the wrest plank and prevents damage to the pins as well as to the case.
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