Item Type: Guitar String Retainer Material: Metal 1,Durable and Reliable: Made of premium metal, these electric guitar string retainers are built to last and provide a secure locking mechanism for your strings. 2,Easy to Install: These roller can be easily installed on the head of your electric guitar, providing a quick solution to keep your strings in tune. 3,Enhanced String Stability: These locks prevent your guitar strings from slipping out of tune, ensuring that you can play with accuracy and maintain consistent intonation. 4,Smooth Locking: The locks offer a smooth and secure locking action, allowing you to confidently perform bends, vibrato, and other guitar techniques without worrying about string slippage. 5,Universal Compatibility: These locks are suitable for use with most electric guitars, providing a versatile locking solution that can be used with various string and head designs.2 x Guitar String Retainer 2 x Screw