The temperament strip is used to mute off the outside strings and one is enough to tune two octaves at a time.The mutes are made of durable rubber to assure long time use. Tuning hammer with wooden shank is for ease and comfort while doing mute job.Four mutes(two with handles) are tapered for more easily muting the section. With the tools, you are able to finish the piano fixing job by yourself and learn some kind of new ability during this process and also money-saving.Indispensable kit set for piano players to do piano tuning work. Specification:Handle Material: MetalMutes Material: Rubber Color: Shown as picturesTemperament Strip Size(LxW): Approx. 104x3cm/40.94x1.18inchTuning Hammer Size(LxW): Approx. 15x4cm/5.90x1.57inchLong Mute Size: Approx. 10x1.3x1cm/3.93x0.51x0.39inchMute with Handle(LxW): Approx. 22x2.5cm/8.66x0.98inchin cludes:2 x Long Mutes2 x Short Mute with Handle1 x Temperament Strip1 x Tuning Hammer