Two adjustable screws enable quick diameter adjustments for a snug fit; the alto sax ligature is made of brass with a smooth polished surface. The saxophone mouthpiece metal clasp allows easy and precise fixing of the mouthpiece, providing protection and support during performance. Made of copper material, the saxophone ligature resists deformation for lasting use; the metal clasp again allows easy and precise fixing to ensure reliable protection and support. Secure fastening design firmly holds the instrument, preventing slipping or loosening. The ligature is versatile and suitable for saxophone, alto saxophone, and other instruments. Use scenarios: - Use during live performances to prevent mouthpiece movement during energetic passages. - Use during practice and mouthpiece changes when quick diameter adjustments are needed for different players. - Use when traveling or performing with multiple sax models, due to broad compatibility with saxophone, alto saxophone, and other mouthpieces.