Hyundai Repair: 01 Elantra Rear Brake Piston Tool, rear disc brakes, caliper piston

Question
I know that you need a special tool to push the piston back into the caliper on the rear disc brakes on an elantra but what is this tool called, what does it look like, and where can i get it?

Answer
The tool is generically referred to as a rear caliper piston compressor or a screw-type caliper piston compressor.  There are several different versions of the tool.  One is a cubical block with different pin locations on each face, and a 3/8 square drive hole in each face for you to attach a ratchet and extension.  Another version is a device with a screw and a spacer plate, and a selection of discs with differently spaced pins that fit on the end of the screw.  If you stop by your local Sears, they should have something in their automotive tool section that will get the job done.  If not, try your local parts jobber.