When required in 5 axis configuration it is called F series, so the M Series is limited to 3-4 axis. Depending from the specific application, the table(s) can be equipped with many different type of surfaces and clamping systems (phenolic vacuum, aluminum, T-slots inserts/steel, rails/pods/vices, additional lathes, special solutions). The spindle heads and Automatic Tool Changers can be different in function of the materials and the expected performances. Multiple spindles can work as a single unit, on the same slide, or independently (Multiax Independent Cutting Units) with twin independent process. In this case is like having two single table machines, producing independently one different (or identical) part on each table, at the same time. The productivity of these configurations are incredibly amazing.