Its the combination of two facing each other 5 axes K-line systems sharing the same wide working area. It integrates all beneficts and versatility of two indepentent 5 axes milling systems driven by two syncronized CNC ......Its the combination of two facing each other 5 axes K-line systems sharing the same wide working area. It integrates all beneficts and versatility of two indepentent 5 axes milling systems driven by two syncronized CNC control units.