I have a bunch of AXA and several BXA toolholders, all from China. They are all of 'adequate' quality, more than sufficient for hobby use. I figure at the price, that I'll have 1 or 2 in 10 be defective, the 8 are about the price of a new Aloris, so I'm happy.
I'm going to buy some more BXA tool holders this week, 5 or 6, and expect to change the hold down set screws right away for European made metric cap screws (partly to make everything on my lathe 6mm allen head), and check for fit. So far everything I have fits very well. The tool holder could be made of anything with iron in it and will hold well for the depth of cut I typically use.