Piano Tuning Wrench: L-shaped design, handle and abrasion resistance, easy to use and portable to take with you. Rubber Mute Kit: Made of natural rubber and properly tapered, helps you mute the section easier. Extended Temperament Strip: Extended length up to 110cm, made of felt material, applied to mute two octaves at once by pressing between the string groups with a screwdriver or flat hammer handle, this is the most effective way to set a temperament, saving a lot of time. Includes a total of: 1 pc Tuning Hammer, 1 pc Temperament Strip, 2 pcs Rubber Mutes, 2 pcs Rubber Mutes with Handle. Perfect piano tuning kit for apprentices, students, teachers, trainers, professional piano tuners or anyone who wants to learn piano tuning. Material: Wood+metal+rubber+wool felt Color: As shown Package Contents: 2 x Long Mutes 2 x Short Mutes with Handle 1 x Temperament Strip 1 x Tuning Hammer