This will allow your Mac Pro 5.1 to mount certain large capacity 3.5" hard drives with an alternate screw pattern. 6- screw positions to align with a wider variety of drives.
See the comparision image as a reference to the typical Mac Pro 5,1 or 4,1 hard drive tray configuration.
2009, 2010 or 2012 Mac Pro Towers
Item size is the traditional 6" x 4" x 1.125" tray.
This will not fit into the older 2008 Mac Pro 3,1 Tower
Compatible with all 3.5-inch drives, including high-capacity 6TB-18TB drives with new (2014+) screw mount standard.
