This silver-colored metal instrument repair tool is a piano wrench designed as a piano tuning wrench for detailed tuning and string machine adjustment work. It features a long, flat handle with a rounded socket end, making it easier to reach tuning and adjustment parts with controlled movement. A small separate metal adapter piece is included, adding flexibility when working with compatible Steinway European-style pianos and related hardware. The piano adjustment tool is marked with an overall length of 134 mm and a handle width of 14.5 mm, with additional marked dimensions of 12 mm, 2 mm, 2.3 mm, and 4.5 mm. Built for grand piano tuning and adjustment tasks, this wrench helps support accurate servicing of tuning and adjustment parts during repair or maintenance work.
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