The horn button press fits into the retainer and will pop with a screwdriver blade. Then you undo the bolt and remove the retainer. Once that is done there are 2-5/16" holes in the wheel itself that you thread into bolts that go through a wheel puller(I bought as whole kit at Harbor Freight you can spend a lot or a little). You can clear the threaded holes in the wheel by blowing them out with your air hose and a little oil in them doesen't hurt also since they are dry and can strip out or cross-thread. You place the extractor against the center and tighten, usually they pop pretty easy but don't get your face close where you can lose a tooth or bust your nose. Sometimes before I pull one that has never been off I soak the knurled area around the wheel with PB blaster to help loosen them up.