... diamond burin/graver:* Used to engrave different kinds of stele,tombstone,merit monument, guiding monument,caligraphy monument,art stamp,etc.* ... work the finishing on different materials of natural bluestone,marble,granite, jade,etc.* Used to finish the art glass, jade ... lettering, etc on different materials like natural bluestone, marble, granite, jade,etc.* Need cooling fluid such as water or cutting ...