Construction: Crafted from steel, this Piano tuning tool ensures reliability during piano tuning and maintenance, making it a dependable accessory for your piano tuning needs User Friendly Design: Designed for ease of use, this Piano Tuning Wrench is suitable for both beginners and experienced technicians, providing a seamless experience in piano tuning and maintenance Versatile Compatibility: Featuring a square wrench design with two sizes (0.5cm/0.20inch and 0.55cm/0.22inch), it is particularly well suited for older Japanese pianos with small square tuning pins Compact: With dimensions of 6.61inchx0.51inchx0.14inch, this tuning tool is compact yet effective, allowing for easy handling and storage without compromising performance Single Package Inclusion: The package includes 1 Metal Double Ended wrench, ensuring you have the essential tool needed for piano tuning tasks right at your fingertips Size Chart: 16.8cmx1.3cmx0.35cm/6.61inchx0.51inchx0.14inch Opening : 0.5cm/0.20inch and0.55cm/0.22inch Package Includes: 1Piano Tuning Wrench Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.