This kit is a tuning tool for pianos, made of materials, durable and able to serve you for a long time. The L-shaped wrench is comfortable and durable to use, and has no burrs on the surface, which is not easy to hurt your hands. The function of the is to prevent other interfering strings from emitting sounds that interfere with your tuning rhythm. Features -Color:Multi -Material: Metal, rubber and wool felt. -Size: About 19.00X1.20X1.00cm/7.47X0.47X0.39inch. -Using metal, rubber and felt materials, durable and practical. -The tuning wrench is easy to carry and is a good choice for adjusting the piano's temperament. -The rubber mute can be used to stop other strings from vibrating and making disturbing sounds. -Different rubber silencers can roles to assist tuning. -This set of tools is very practical, and those with pianos should keep one at home. Package list: 1 x wrench 2 x sticks 2 x blocks 1 x tape