The rear brakes "require" a tool that spins the piston back into the caliper, but some of us wind up using it on the fronts as well, just because it's a convenient way to compress the pistons.
FWIW, there's a thread on this subject that was posted here not too long ago. If you search for "brake tool," you should find it; closer to the end of the thread, you should find a link to the brake tool kit at Harbor Freight that Quik recommended. I believe the consensus was that the cube-type brake tools don't work well on the LS's calipers.