2.5" to 3.5" hard drive adapter for iMac
This 2.5" to 3.5" drive adapter is designed specifically for mounting in an older model iMac. It has holes for the little screws that would normally go in the 3.5" bracket, and the 2.5" is held in place with little plastic nubs that line up with the drive screw holes. Just bend the holder a bit to get the 2.5" drive in place.