Features: Keep your guitar strings firmly in place with these guitar string trees retainer. Made of metal, these retainers feature a reliable design to prevent string slippage and maintain optimal tension during play. The roller design of our string guides helps to evenly distribute stress on the guitar strings, which not only keeps the instrument in tune but also reduces string wear. Perfectly designed for electric guitars, our Guitar Roller String Trees Retainer serves as an excellent replacement for worn or damaged string retainers. Our advanced roller string guides are meticulously designed to minimize tuning issues and unwanted sympathetic vibrations. Specifications: Materials: Metal Color: Silver/Black/Gold Size: about 5x7cm/1.97x2.76inch Package Includes: 1set Guitar String Retainer note: Please allow 1-2cm errors due to manual measurement, make sure that you not mind before you order. Due to difference between different monitors, the picture may not reflect the actual color of the item.