Enhanced Stability: The Electric Guitar Ball Bearing String Buckle is designed to provide superior stability for your strings, ensuring they remain securely in place during play. Smooth Rolling Action: Featuring a state-of-the-art roller mechanism, this Guitar Rolling Tree Retainer minimizes friction and allows for effortless string movement, enhancing your playing experience. Reliable String Locking: Our String Lock Roller guarantees that your strings stay locked in position, preventing slippage and maintaining accurate tuning throughout your performance. Easy Installation: The Electric Guitar Ball Bearing String Buckle is user-friendly and can be easily installed on most electric guitars, making it an ideal accessory for both beginners and professionals. Durable Construction: Made with high-quality materials, this String Guide offers long-lasting durability and reliable performance, making it a must-have for any serious guitarist looking to improve their setup. Colour:Black Material:Metal Package Contents: 5 * String buckle 5 * screw Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.