Concord Blades CBGW00500SP 1/2 Inch Supreme Wet Stone Diamond Core Bit Crown Segment, 10 mm Segment Height, 5/8"-11 Can be used Wet Only Cleanly Cuts Granite, Marble, Porcelain, Artificialand Natural Stoneand More Max RPM 12,000-use wet only 2-1/2-inch tube length