1.engraving technology support for CNC Engraving Machine 2.Longer life-span than electroplated ... , not deformation and precise engraving .So, it is better for engraving marble, bluestone, sandstone etc. In general,it is ... mm)C536660C1449660C8612660C10812860 EM12-121012121260 1. Applicable material : Professional engraving tools for hard materials, such as stone, granite, gravestone , ceramic tiles, ...