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.MsoNormal Features:<o:p</o:p MsoNormal <ol 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. <o:p</o:p MsoNormal <o:p</o:p MsoNormal <o:p</o:p MsoNormal <o:p</o:p MsoNormal &nbsp; MsoNormal Specifications:<o:p</o:p MsoNormal Condition: 100% Brand New<o:p</o:p MsoNormal Material: Copper-zinc Alloy<o:p</o:p MsoNormal Weight: Approx. 3g / 0.1oz<o:p</o:p MsoNormal Size: Approx. 10mm / 0.4in(Retainer Diameter), 6.5mm / 0.3in(Retainer&nbsp;String Spacing), 5&amp;7.8mm / 0.2&amp;0.3in(Retainer Length), 12&amp;16mm / 0.5&amp;0.6in(Screw Length) &nbsp;<o:p</o:p MsoNormal Optional Color: Gold, Silver, Black<o:p</o:p MsoNormal &nbsp; MsoNormal Package list: <o:p</o:p MsoNormal 1 * 7.8mm&nbsp;String Tree Retainer<o:p</o:p MsoNormal 1 * 5mm String Tree Retainer<o:p</o:p MsoNormal 1 * 16mm Screw<o:p</o:p MsoNormal 1 * 12mm Screw<o:p</o:p