... Slate, grindstone ,Jade, crystal, plexiglass, aluminum composite panel, aluminum block, copper and so on.Technical Features of Dual-spindles Tile Engraving ... two for cooling tools.Users can use this machine to engrave two works at the same time. so it's ... engraving area, motor, spindle, control system, software, and other configurations. high quality cnc stone router wtih two spindles for sale JCS1325