... , not deformation and precise engraving .So, it is better for engraving marble, bluestone, sandstone etc. In general,it is better ... -0612612660EM8-0810812860 EM12-121012121260 1. Applicable material : Professional engraving tools for hard materials, such as stone, granite, gravestone , ceramic tiles, ... developmewnt of Chinese Diamond Tools industry. EM6-0612 Diamond End Mill for Engraving Machine