10mm
A 3/8" Allen wrench will remove that bolt on the front caliper.
Try 3/8 Allen key , or 15 mm wrench.
You need a 3/8 Allen key.
the caliper bolts require a 3/8" Allen wrench. You can buy these as a socket at just about any parts store.
7mm Allen wrench
9mm Allen wrench
7mm Allen
Just a "c" Clamp to retract piston into caliper body, and a 3/8 Allen socket/wrench to remove the caliper bolts
it's a 3/8 wrench for both 2003 and 2004 caliper.
You need a 3/8 Allen Wrench
Most likely a 15mm wrench. Unlikely to be Allen in that vehicle.
I believe that is 7mm Allen key.