3/8" Allen wrench should do it.
Obviously the first person to answer this is not a mechanic. The size varies from vehicle manufacturer to manufacturer. Just take the caliper to Auto Zone or a NAPA Auto parts store and get the correct size bolt.
15 mm is the size,for caliper bolts caliper bracket bolt is t60(it is star shaped)
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.The 2000 Chevrolet Monte Carlo brake caliper bolt size is 9/16. The brake caliper bolt can be purchased at most auto-parts stores
18mm
size of bolt on break calliber on Chevy trailblazer
Caliper retaining bolts. Torx T-40 or T-45
9 mm by 1.25
The bolts that hold the brake caliber in place.
The caliper bolts are 5/8" and should be torqued to 70 foot pounds when re-mounting.
Torque specs for brake caliper bolts 2005 mazda 6
Rear caliper to rear caliper bracket bolts, 32 ft. lbs.
there are 2. 1 is 14 mil. the others are 17 mil.