I liked these so much I got 12. If you have to have them all in one, the shafts just press out and then you can turn down your leadscrew to size and press back together. http://www.ebay.com/itm/111122742913?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
And they are not made out of CHINESIUM