1. FitThis tailpiece is designed to be compatible with both 3/4 and 4/4 violins, offering versatility and easy installation on your instrument. 2. Carbon FiberMade from carbon fiber material, this tailpiece tuner provides strength, durability, and wear resistance. It is lightweight and designed to prevent slipping during play, ensuring maximum comfort and stability. 3. Precision FineTuningFeaturing four integrated finetuning designs on the tension plate, this tuner allows for accurate and precise pitch adjustment. The finetuning screws are engineered to resist fading and deliver longlasting performance. 4. Secure and StableThe copper nuts and hooks on this tuner are also made of carbon fiber material, offering strength and resistance to slipping and shaking. It can stay securely in place during performances.