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Google is your friend here, just highlight? [Norman style vs an ALoris style] from your message and add the word toolpost and then search for images. Pictures def worth a thousand words in this case. There is some confusion in that the Norman patent toolpost and the Van Norman milling machine company sound the same, but are different things. Aloris toolposts?come in different sizes for different sized lathes, denoted OXA, AXA, BXA, CXA. All the knockoffs stick with that nomenclature.