... ! Factory Price! Stone/glass/Marble CNC Engraving Machine with Auto Tool Changer Application Materials :Artificial stone, Marble, Granite, Ceramic ... Travertine, Quartzite, Slate, grindstone ,Jade, crystal, plexiglass, aluminum composite panel, aluminum block, copper, wood, MDF, hardwood, plywood and so ... have features of easy maintenance.4.Linear type Auto tool changers can hold 6 or 8 cutting tools ...