Some typical piano tuning resources: From top to bottom: a tuning lever, a felt mute, a rubber mute, a felt temperament strip (still left), along with a Papps mute. Common resources for tuning pianos incorporate the tuning lever or "hammer", many different mutes, along with a tuning fork or Digital https://johnnyeargu.blogvivi.com/31460214/everything-about-piano-tuning-near-me