... , 2D engraving, 3D engraving, cutting down side, clear bottom, drilling.Greatest advantage of sintered diamond burin/graver:1. Soomth working ... such as water or cutting fluid.* Non-collision in the process of working with these diamond tools which are hard ... is 1--3mm in case the workpiece is curshed. brazed diamond engraving tools | sintered diamond burin for engraving jade, stone, granite,etc.