Some widespread piano tuning instruments: From top to bottom: a tuning lever, a felt mute, a rubber mute, a felt temperament strip (left), and a Papps mute. Common resources for tuning pianos include the tuning lever or "hammer", a variety of mutes, and a tuning fork or Digital tuning system.[fifteen] https://bestrestaurantbrandingage15825.glifeblog.com/30137694/indicators-on-piano-tuning-service-you-should-know