I made this tool to push the pucks back in on disc brake jobs. It's easier than trying to use c-clamps, and it's dead cheap.
The center bolt is just a long bolt, but you could use all-thread. All nuts and the bolt head are 1/2".
The puck end has a double-nut on it, the other end has a bolt head that I turn with a socket wrench. You could put a particular sized washer on this end to keep the tool centered in the puck. I haven't, and it still works well.
The flange is just a heavy piece of scrap I had laying around. The center nut under the flange has a wrench on it to hold it while turning the socket wrench to tighten.
I've use it on my F250SD, my 98 Z28, Daughter's 97 Dodge Avenger, and the CRX.
Thought you might like to see it.