... installers, anti ram raid installers. Or anyone how needs holes cut in concrete or masonry. advantages 1. One general purpose core ... hole.Capable of drilling holes from 8mm ~102mm. 4. 20 diamond core drill bits .20,22,24,28,50,63,76 ... AE.run.minisite.productShow(); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); concrete or stone diamond core drilling machines