Concord Blades CBGW01375HP 1-3/8 Inch Premium Wet Stone Diamond Core Bit 3.5" Segment Width, 10 mm Segment Height, 5/8"-11 Arbor Can be used Wet Only Cleanly Cuts Granite, Marble, Porcelain, Artificialand Natural Stoneand More Max RPM 3,500-use wet 3-1/4-inch tube length