Hi, you need an Allen wrench, I'm ot exactly sure of size but the size is MM not stardard.
Probably something close to a 21 millimeter
On some later model Fords the calipers have 7mm Allen heads, -an unusual size.
I just did my 2005 Ford Escape front brakes and the caliper was 7mm Allen and main holder is 18mm ...RRR Wis.'
12 millimeter
I believe that needs a 3/8 Allen or some models, 7mm Allen.
What size line wrench for a 2005 freestar
7 mm. It isn't in most compact wrench kits.
It will be a 14 or 17 mm wrench.
13mm
It is not Allen . It is a 14 mm open wrench
This week, I have changed the brake pads on two vehicles that I have never worked on before. I jack them up and get in there with a full set of Allen keys and small wrenches within reach. I look and see if it needs an Allen key or wrench and approximately what size. Then I try tools that may fit till I find the correct one -usually within 2 tries. - This is not a complicated exercise. . . .
Check your brake fluid level.