Description Features: These guitar replacement kits are made from metal and are durable. Premium replacement jacks for guitars. Comes with mounting screws for easy installation. The rollers on them can lessens the stress on your strings, which allows the guitar to stay in tunes longer. Great replacement for your broken, dirty or old string retainer. Package includes: 1x Jacks Socket, 2x String Retainer. Specifications: Material: Metal Size: As Shown in the Picture Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Jacks Socket 2x String Retainer