The DEWALT Extreme Diamond Cutting Blade has a 3 x 12mm diamond segment with an aggressive cut pattern giving faster cuts and longer blade life. With an optimised wheel edge design for better debris removal. For cutting through concrete and masonry materials, wet or dry conditions. Ideal for use with the DCS690 FlexVolt XR Cut Off Saw. This DEWALT Extreme Wet & Dry Use Diamond Blade has the following specification Diameter 230mm Bore Size 22.23mm Segment Height 12mm Segment Thickness 2.6mm Max. rpm 6,600/min.