Some frequent piano tuning equipment: From best to bottom: a tuning lever, a felt mute, a rubber mute, a felt temperament strip (still left), plus a Papps mute. Common instruments for tuning pianos incorporate the tuning lever or "hammer", various mutes, and also a tuning fork or Digital tuning product.[15] https://zanderaawqi.vblogetin.com/36488591/the-ultimate-guide-to-piano-repair