1.engraving technology support for CNC Engraving Machine 2.Longer life-span than electroplated tool 3. ... konw how to better use diamond tools2.We can operate CNC Engraving Machine.So we know Diamond Tools Making requirements3.We ... , ceramic tiles, glass, marble, etc. 2. Applicable engraving : Multifunctional, like line-engraving , V-sharp small word, hard jade 3D relief ,etc ...