Some common piano tuning resources: From leading to base: a tuning lever, a felt mute, a rubber mute, a felt temperament strip (left), in addition to a Papps mute. Common tools for tuning pianos involve the tuning lever or "hammer", various mutes, and a tuning fork or electronic tuning machine.[15] https://hud-helmet87541.bloginder.com/31497492/the-2-minute-rule-for-piano-tuning-service