3/8"
7mm Allen
9mm Allen wrench
I believe that is 7mm Allen key.
You need a 3/8 Allen Wrench
Most likely a 15mm wrench. Unlikely to be Allen in that vehicle.
Not likely to be Allen key, try 15 mm regular wrench
Metric Allen wrench.
You need a 3/8" Allen wrench to remove them.
It takes a FA12A Allen wrench.
T-60
3/8
That's a 7mm Allen key.