This listing is for advertising purpose. (some customers name this model A0, SWH-AA or others). The tool post body is just a little bigger than a pingpang ball. AA Plus includes one more cutting off tool holder & than standard AA QCTP kit. Details are as following. 1 x Aa multifix tool post and locking wrench. 3 x AaD1250 turning tool holders. 1 x AaH1250 turning & boring bar holder. 1 x tool holder locking T wrench. Parting off tool holder. 1 X HSS blade Size 2X10X200MM. Aa is about the smallest model made in China. Then A1(A), E5(E), B2(B), C3(C), D1(D), D2. D2 is the biggest model. Aa can be installed on AT125. BV20, SINO210V lathes, etc. For turning diameter is from 120mm to 220mm4.7. The Aa tool post can fit my 180mm(7) swing bench lathe well. From cross slide surface to spindle center line height is 56mm. Our Aa has sales in Israel, France, Russia, Thailand, Finland, USA, Canada, Norway, etc.