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Metric Allen wrench.
It will be a 14 or 17 mm wrench.
the caliper bracket bolts use 18 mm wrench on a 03 1/2 ton 4x4
use an Allen wrench not a socket or open or box wrench.
the caliper bolts require a 3/8" Allen wrench. You can buy these as a socket at just about any parts store.
It should be a 3/8" Allen wrench.
7mm hex socket
it takes a 7mm Allen wrench to remove calipers on 2003 ford focus.
t-60
Most likely a 3/8 Allen, but 15 mm wrench is possible.
Lug Wrench to remove tire & Wheel Socket Wrench or Hex Wrench to remove Caliper bolts Large "C" clamp to collapse caliper piston Rags, and a good spray brake cleaner
Loosen and remove the caliper retaining bolts. Torx T-40 or T-45