Piano Tuning Wrench: L-shaped design, handle, durable and abrasion resistant, easy to use and portable to carry with you. Rubber Mutes Kit: made of durable and natural rubber and correct taper, help you mute the section easier. Extended Temperament Strip: Extended length up to 110 cm, made of felt material, applied to dampen two octaves at the same time by pressing between the groups of strings with a screwdriver or flattened hammer, this is the most effective way to set in a temperament, a lot of time. Totally includes: 1pc Tuning Hammer, 1pc Temperament Strip, 2pc Rubber Mutes, 2pc Rubber Mutes with handles. 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 Mute 2 x Short Mute with Handle 1 x Temperament Strip 1 x Tuning Hammer Only the above package contents, other products are not included.< br/> Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The permissible measurement error is +/- 1-3 cm.