Many years ago (1971) I owned a 6″ Atlas and then later a 12″ Atlas. I was not happy with the way they performed and got rid of both of them. I like the 9″ much better as it is more precise and can take a heavier cut than the Atlas. The 9″ and the other sizes are made by one company which I think is Central Machinery. The machines are marketed under various names such as Grizzly, Enco, Harbor Freight and many others but they are all the same item.