Metal Material- Our ssd mounting bracket is made of metal,which could strengthen the heat-sinking capability, so provides your hard drive a full protection. | 2.5" To 3.5" - 2.5" To 3.5" Mounting Adapter Bracket SSD Caddy, Support 2.5" hard drives (SSD and HDD) of laptop, compatible with SATA I, SATA II, SATA III. | PRECISE FIT- 4 screw holes are designed on the SSD Bracket Mounting Adapter Bracket, which precisely corresponds to the 4 screw holes on the hard drive. | SCREWS INCLUDED- 16 pcs(8pcs per adapter) screws included for each 2.5 to 3.5 bracket to ensure you can mount the bracket onto the PC case. | Package Include: 2 x ssd mounting bracket 2.5 to 3.5 , 16x Screw, 5pcs colorful Reusable Cord Organizer