If you can use one of the other versions please do so. This m.2 bracket is for the G751 laptop and holds the m.2 drive with room for a naked (removed from case) ssd under it larger than 250gb. This version is open top for heatsinks to be applied to the m.2 drive. You will need to install the naked drive first then install the m.2 inside of this bracket and install this bracket on top. This is the most fragile version and not recommended. I would suggest the other versions if you are either not installing multiple drives in bay 1 or the second drive your planning to install is a 250 evo which will fit fine with all of the other brackets or you are not using heatsinks in which case i made a covered top version for more rigidity.