It takes a 7mm allen wrench.
I believe that is a 7mm Allen.
You need a 15 mm regular wrench.
Metric Allen wrench.
It will be a 14 or 17 mm wrench.
10mm or 3/8
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
You need a 3/8" Allen wrench to remove them.
9mm Allen wrench
use an Allen wrench not a socket or open or box wrench.
the caliper bracket bolts use 18 mm wrench on a 03 1/2 ton 4x4
The front caliper on a 1995 Ram is requires a 3/8 inch Allen wrench to remove the bolts.