A 20 to 25 mm remover would have worked much better than this one from IceToolz that I have. Anyway, I went back out there, pumped up the compressor to 120 psi; I usually have the shut off set to 100 psi, and tried again with the impact wrench. It came off this time! Thank you, FBinNY, for your advice and the kind offer to send a proper size remover.