I ordered two tools. One is for removing the porcelain, and the other for tapping and removing the sleeve. There is a little rubber stop that goes into the sleeve before you tap it to catch any metal shavings, but I am a bit nervous about the porcelain part. I have got some small tubing I am going to rig up to a shop vac to make sure nothing is left in there. If I miss so much of a spec of that porcelain....I don't want to even think about that. I am probably nuts for even trying to this myself.