... card 4.linear round gui rail & ballscrew Multifunction 4 -axis CNC Engraving Machine ZK-6060 ApplicationsWood ,Metal, Stone,acrylic ,organic glass ... for the metal, hard materials, avoiding breaking the cutters and work piece. 4. 2.2kw water cooling spindle, more powerful.5 ... , All kinds of CAD/CAM software.7. Good at small work piece precision processing, mainly used for metal, such as aluminium ...