I believe that one is 3/8 allen wrench, but it takes about 5 minutes to check so you should make sure.
7mm Allen wrench
I just did my 2005 Ford Escape front brakes and the caliper was 7mm Allen and main holder is 18mm ...RRR Wis.
9mm
On some later model Fords the calipers have 7mm Allen heads, -an unusual size.
7mm Allen
What size Allen socket is needed to remove bolt from caliper on 2004 ford escape
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.
I believe that may be 7mm Allen.
7 mm Allen wrench