The ability of a piano to stay in tune depends directly on the quality of the pinblock. It is the function of the pinblock to hold the tuning pins in place. Should one of the pins yield to the tremendous string tension, the piano goes out of tune. Layers of northern rock maple grip the steel tuning pins so securely that there is practically no possibility of slippage. Furthermore, since the special glue which holds these layers together is entirely impervious to moisture, the pinblock is unaffected by dampness and humidity changes. This powerful construction completely eliminates loose tuning pins.
