... 25mm to 75mm, crown type and segment type to choose: Diamond Core DrillOut DiameterWorking LengthSegment Hight(mm)(inch ... L170, plate, abrasive, wheel-.polishing: pads, abrasive-.drilling: core drilletc. For all natural stone such as granite, marble, ... minisite.productShow(); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); Diamond core drill bit for stone and concrete with professional segment