... monument,caligraphy monument,art stamp,etc. Main purpose of sintered diamond burin/graver:* Used to engrave different kinds of ... cutting down side, clear bottom, drilling.Greatest advantage of sintered diamond burin/graver:1. Soomth working without chipping2. Long-life ... case the workpiece is curshed. brazed diamond engraving tools | sintered diamond burin for engraving jade, stone, granite,etc.