New knuckle for grand piano hammershanks.  Width is 12mm, diameter is a little over 3/8" (.389").  The wood core is .088" thick (and 12mm wide).  Good for replacing worn or motheaten knuckles.  Worn knuckles make it particularly difficult to get a good hammerline set and hammers will often rest at slightly different heights as a result of the jack not resetting to the exact position each time.

I've been a tech 30+ years and am glad to help. Contact me with any questions you have about this item (or any others in our store) before or after the sale. You can reach me through Ebay and my contact info is included with each shipment.

We combine shipping. Put all the items you're interested in purchasing into your cart - when you checkout Ebay will automatically combine the weight of eligible items and calculate shipping.

Quick video discussing knuckle repair and replacement:

Grand Piano Knuckle Bolster/Replace

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