... cooling system protect the tool effectively whileprocessing all kinds of stone.3.Automatic oil supplier makes the maintenance operation easily.4 ... waterproof design ensure stable transmission. Application:3D/2D engraving,Embossment,Line engraving ,Cutting,Edge inversing,Drilling on Natural stones,Granites,Artifical ... ,Ceramic,Glass and so on. 2.2 kw spindle power Stone Engraving Machine with water tank