I have read many negative reviews on this product Indeed, it is plastic, but making sure it can be mounted on a rack without problem (I'm not saying it's all compatible racks), enlarging precautionary mounting holes. 8 screws for 2 SSD and 4 on rack mounting bolts are provided. This is fine An objective complaint would be that, once installed, the 2 SSDs are very close, which does not simplify the connection of power plugs. For Sata connection, thinner, it does not cause problems.