... stamp,etc. Main purpose of sintered diamond burin/graver:* Used to engrave different kinds of stele,tombstone,merit monument, ... guiding monument,caligraphy monument,art stamp,etc.* Used to work the finishing on different materials of natural bluestone ... will be achieved on the products by using these products.* Used to line engraving, 2D engraving, 3D engraving, cutting down side, ...