Material: Anti-vibration washer and ssd screw, solid state drive screw is made of high-quality metal, rust proof, sturdy, long service life. | How to use: ssd screw is fixed to the computer hard drive, blue isolation grommet ring mute. | Package content: 8pcs hard drive isolation screws with washers, enough to easily meet your use and replacement needs. | Features: ssd screws, isolation grommet mute mounting screws, providing excellent shock absorption effect. | Application: For 3.5-inch hard drives, compatible with DC7800, DC7900, Elite 8000, 8100, 8200, 8300, Pro 6000, 6005, etc.