Try 14 or 17 mm wrench. Most common on Jap cars that period.
On the back of the caliper there should be a bolt its a 14mm you take it out and inside there is a bolt also its Allen key you use and Allen key and retract the caliper. it works on all 626 from 1994 till 2002
A 3/8" Allen wrench will remove that bolt on the front caliper.
.The 2000 Chevrolet Monte Carlo brake caliper bolt size is 9/16. The brake caliper bolt can be purchased at most auto-parts stores
you have to turn the piston like a bolt
you need to take off both caliper bolts and remove the caliper from the carriage... most Mazda calipers will not pivot...
If memory serves, 18mm. That would be the bracket bolt. The caliper bolt has a 9mm thread.
dealer or junk yard.
t-45 torx
7 mm. You can buy this.
This is how you will replace the front brakes on a 2000 Saturn Sc first you will jack the car up with jack stands. You will then remove the front wheels, next remove the upper caliper to mount bolt only. Then you will pivot the caliper downward to access the pads, you will remove the old pads and install the new pads. You will use a 'C' clamp and a old pad to bottom the caliper piston and you will pivot the caliper back into place and re-install the bolt.
Disengage the parking brake before attempting to remove the caliper.
stubby 18mm wrench and a hammer