Some popular piano tuning resources: From leading to bottom: a tuning lever, a felt mute, a rubber mute, a felt temperament strip (remaining), plus a Papps mute. Prevalent resources for tuning pianos consist of the tuning lever or "hammer", several different mutes, in addition to a tuning fork or Digital https://edwinduvgq.alltdesign.com/the-ultimate-guide-to-piano-tuning-50523284