This piano hammer grinding tool is a compact piece of music equipment designed for piano tuning and hammer surface care. As a piano hammer sanding block, it helps remove uneven wear and supports accurate string-hammer wear correction during maintenance work. Made from aluminum alloy with a gray metal finish, this piano maintenance block offers a solid feel and stable handling in daily use. The block-like body features curved cutouts and four sandpaper-covered faces, giving the hammer wear correction tool a practical four-sided working surface. With 400-grit sanding surfaces and a lightweight 45 g build, it is suited for controlled smoothing of piano hammers when fine adjustment is needed.
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