The ball studs need a 3/16" nut driver.
AE plastic tools are only good for building the car at best, wear out before you can take it apart!
I have AE factory team nut driver for the job, works well - #1562
PS the other nut drivers you need for the car are the 1/4" (which is for the oversized nuts on the front shock tower, the slipper nut, and the plastic front wheel nuts, if you have them), and 11/32" (for the rear wheel nuts). They don't get as much use in the build as the 3/16" but they are well worth purchasing.