Features: 1.Made of premium copper-zinc alloy, it is quite durable and strong. 2.It is installed on the head of the guitar, pressing the strings, guiding the strings to go in the right direction. 3.Comes with 2 string retainers and 2 screws, easy to use and install. 4.They are designed to replace the old or damaged string tree retainers of electric guitars. 5.Perfect and necessary instrument replacement parts for electric guitars. specification: Made of premium copper-zinc alloy, it is quite durable and strong. It is installed on the head of the guitar, pressing the strings, guiding the strings to go in the right direction. Comes with 2 string retainers and 2 screws, easy to use and install. They are designed to replace the old or damaged string tree retainers of electric guitars. Perfect and necessary instrument replacement parts for electric guitars. s: Condition: 100% Brand New Material: Copper-zinc Alloy Weight: Approx. 3g / 0.1oz Size: Approx. 10mm / 0.4in(Retainer Diameter), 6.5mm / 0.3in(Retainer String Spacing), 5&7.8mm / 0.2&0.3in(Retainer Length), 12&16mm / 0.5&0.6in(Screw Length) Optional Color: Gold, Silver, Black Package list: 1 * 7.8mm String Tree Retainer 1 * 5mm String Tree Retainer 1 * 16mm Screw 1 * 12mm Screw