40 Way Quick Change Tool Post and Holders to suit mini lathe - Size is referred to as either Aa or A0. IMHO the best interchangeable tool post system (I have a Haase Model E on my large lathe). Suits mini lathes with a turning diameter from 120mm to 220mm (4.7--8.7). Suitable for small lathes like the Sieg range. I believe the tool post and holders are also interchangeable with Optimum's SWH-AA tool post set. The set includes: 1 X Aa tool post and locking handle, 3 X AaD1250 turning tool holders, 1 X AaA1250 boring tool holder, 1 X tool holder screw T wrench. 1 X Central Fixing Post...