Item Type: Guitar String Tree Retainer Set Material: Iron 1Easy Connection: Boat shaped audio cable jack plate, suitable for audio interface of electric guitar, convenient for connecting electronic devices. 2Good Neck Plate: The neck plate reinforcement plate effectively prevents neck deformation and improves the stability and sound quality of the electric guitar. 3Iron Material: Made of premium iron material, sturdy and reliable, ensuring a long lasting durability and good performance. 4Quick to Install: Equipped with installation screws, it is simple and easy to use, and can be quickly installed on an electric guitar, saving time and effort. 5Better Fixing: Specially designed for electric guitar string rollers, providing stable rolling function to ensure accuracy in pitch. 1 x Guitar Socket Board 1 x Guitar Neck Plate 2 x String Roller Retainer 4 x Big Screw 4 x Small Screw