Engineered to cut holes in GLASS,TILES,SLATE,MARBLE, GRANITE,with ease!!! Diamond tiped hole saws (Core Bits)Engineered to cut holes in glass, tiles, slate, marble, granite,with ease!!! You can cut the following size holes 3mm,4,5,6,8,10,12,14,15,16,18,20,22,23,25,28,30,32,35, 38,40,42,45,48,50,53,55,60,65,70,75,80,85,90,95,100mm.(Other size are not listed on,please contact us) These bits do not ...