Package includes: You will receive 1 piece 11*3*1.2cm The wrench, 20 pieces 4CM tuning nails, 20 pieces 0.6*0.4CM rivets with.
Material:Made of high quality metal and copper, they are clear and beautiful, do not hurt your hands, easy to adjust, the shiny surface and hardness of the material ensure the durability of these materials.
Widely Used:The piano tuning keys are specially designed to tune the Gugu and most mechanical devices with square openings, suitable for apprentices, students, teachers, trainers, professional piano tuners or anyone who wants to learn to tune.
Ergonomic Handle: The polished and non-slip fine handle makes it very convenient to hold the key in your hand, adjust the piano with great stability and flexibility, help you get great control while rotating.
EASY TO USE: You can adjust the tension of the string with the corresponding adjustment keys, rotate clockwise or counterclockwise to achieve a perfect inclination, this tool is an essential accessory for any harpist or musician.