"Caliper anchor bolts" hold the brake caliper on, they require a 3/8" Allen wrench to remove.
use an Allen wrench not a socket or open or box wrench.
It takes a FA12A Allen wrench.
You need 15 and 18 mm wrench.
You need a 7mm Allen wrench for the caliper bolts.
7MM
It's 17mm bolts on that year Camry.
Remove the caliper retaining bolts from the inside of the caliper. Lift the caliper off the mounting bracket and over the rotor. Slide the old inner and outer brake pads out of the caliper, and slide the new brake pads into the caliper.
Probably something close to a 21 millimeter
The caliper bolts can be accessed from the rear of the caliper. After removing the tire you can view the recessed brake caliper bolts. You will need a large Allen wrench, as these are Allen head bolts. Consult your auto parts store for the proper size Allen wrench. Common toolbox wrenches will be far too small. I would advise to spray down with some WD-40 the night before. You should also make available a large hammer to hit the wrench and loosen the bolts, as it is an akward position to muscle the bolt free with a short wrench.
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
I just did this the other day om ny 2004 silverado. Once the tires are off, remove the brake calipers. There are two "star bolts" on the rear of the caliper (top and bottom). Remove these bolts using a T-55 socket bit. Then lift the caliper up to remove it. you might have to move it back and forth to get it out of place since the pistons are compressed against the brake bads. After it is loose, you have to support the caliper so you don't put pressure on the brake lines. I used a coathanger to support it so it doesn't dangle. Just wrap the coathanger around the caliper and tie it to something underneath so it doesn't fall. Then you need to remove the caliper mounting bracket. There are 2 bolts holding this on (top and bottom). They are 18mm bolts and they are on VERY tight. I got them off using an impact wrench and hammering on an 18mm large open end wrench. Make sure you use the "box" side of the open end wrench so you don't strip the bolts. Once those are off, the caliper mounting bracket will come off and you can remove the rotor. The hardest part of this job was taking off those 18mm caliper mounting bracket bolts. Hope this helps.