... in granite, marble, tiles, glass and most masonry. PROFESSIONAL DIAMOND CORE DRILL / HOLE SAW . THESE BITS ARE FROM 8MM DIAMETER TO 55MM ... ,40,45,50 & 55MM DIAMOND SEGMENT HEIGHT OF 6MM CAN DRILL HOLES TO A DEPTH OF 45MM in granite, marble, tiles ... SWIVEL (WHICH YOU WILL FIND IN OUR WEBSITE) Professional Diamond Core Drill ( Hole Saw)