Piano Aftertouch Gauge

Howard Piano Industries

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Set of 5 gauges used to measure the aftertouch on either a grand or vertical piano.  The thicknesses included are .020", .030", .040", .050" and .060".  There is a slot in the end to fit around the key pin.  The gauge can be put either under or over the felt front rail punching.  The video below demonstrates how to use this tool.