My Problem
Wanted to upgrade the RAM
My Fix
Found out that I didn't need either tool, because the instructions from Apple did not require the disconnection of the battery for either RAM or Hard Drive.
My Advice
You should update your guides, the mid-2012 Macbook Pro uses Philips screws and according to Apple's own documentation, there is no need to disconnect the battery, which I find curious when compared to prior experience with PC laptops. However, I like the build quality of your tools.
Written