I bought this adapter to host an SSD 2.5 "in a tower PC with 3.5" bays. The SSD diisque mounts easily with screws provided, provided you use the top, because the other requires a magnetic screwdriver and good dexterity to access the screw holes through the "holes-provided to OPER- ATE THIS effect "of Part 3.5". Everything is spoiled when you want to secure the assembly in the tower because the holes and the screws are provided with a diameter LOWER than the real disk 3.5 "! From here you have the choice between throwing, tinker, or enlarge the holes (but what thread? I opted for the latter, after finding that ALL adapters offered by Amazon have the same defect, according to the complaints of buyers ... So, get ready to tinker;