9mm
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.
I believe that may be 7mm Allen.
7 mm Allen wrench
Try 7mm -it's not in many Allen sets, which is why Ford picked it.
On some later model Fords the calipers have 7mm Allen heads, -an unusual size.
9mm Allen wrench
it's a 3/8 wrench for both 2003 and 2004 caliper.
The Allen wrench size for the front caliper slide pin bolts is 3/8".
Metric Allen wrench.
It would be either a 15 mm wrench or a 7mm Allen key.
It takes a FA12A Allen wrench.