... , crown type and segment type to choose: Diamond Core DrillOut DiameterWorking LengthSegment Hight(mm)(inch)(mm)(inch)(mm)( ... grade:-1. fast cutting: fast sharp=high daily output, no chipping, good cutting surface, consistency, high production. Most expensive2 ... & L170, plate, abrasive, wheel-.polishing: pads, abrasive-.drilling: core drilletc. For all natural stone such as granite, marble, sandstone ...