9mm hex key front and 7mm rear
Loosen and remove the caliper retaining bolts. Torx T-40 or T-45
Try a TORX T-40 or 45 Many second generation Expeditions (2003-2006) use a 9mm to remove the front caliper and a 7mm for the rear.
45t
if your looking for the front abs sensors thay are located in the hubs, and would have to remove front tire, brakes,caliper, and rotor to remove.
9mm Allen wrench
T55
The T60 is the size needed to remove caliper bracket.
7mm hex socket
Metric Allen wrench.
It takes a T55 Torx bit on the front calipers.
t-60
Use a screwdriver to lever piston back (between caliper and front of piston). remove caliper, usually two bolts, remove pads from caliper, fit new ones same way. re-fit caliper.