These are some common tools used to work on this device. You might not need every tool for every procedure.
Released 2012 Core i3 or i5 cpu. CPU is soldered and cannot be upgraded.
req 7mm low profile harddrive or SSD.
Upgrade RAM using DDR3 1600 spec
Basics: Remove screws from lower panel - remove keyboard - this allows removal of lower panel which then allows you access to the motherboard and harddrive to upgrade.
I recommend adding a 7mm Western Digital black SSHD 1TB when released. Compatible SSDs include the Crucial M4, Samsung 830 and 840 models.