1.For marble,granite,tombstone, milestone... 2. Stable T type structure, especially for heavy duty stone 3 ... :1.Suitable for natural marble, granite, bluestone, sandstone, artifical stone, tombstone, milestone, ceramic tile, jade, crystal, ceramics, glass, plastic, wood, ... 3D embossment, and line engraving, bevelling, drilling 2D engraving.2.Such as granite stone can be layered engraving to 3mm3 ...