Description Our piano tuning tools are designed to provide adjustments for your instrument. The set includes red keyhole felt plugs in four different sizes, ensuring a fit for various tuning needs. These tools are essential for maintaining the optimal performance of your piano, making them a must-have for both professional tuners and enthusiasts. Features -Color:Red -Material:Plastic -Size:4.00X1.40X0.90cm/1.57X0.55X0.35in -Precise tuning: ensures accurate sound adjustment for a pure and professional piano tone, for musicians and technicians alike -Efficient repair assistance: designed to address keyhole issues effortlessly, extending the lifespan of your piano with minimal effort -Compatibility: covers 3.4 to 3.7 hole diameters, making it suitable for a wide range of piano models and enhancing tuning efficiency -Distinctive red design: features a bright red color for easy identification and operation, reducing errors during maintenance tasks -Comprehensive set: includes different sizes to meet diverse piano maintenance needs, ideal for both routine care and urgent repairsPackage list: 4 x piano tuning tools