7", Dry Cut Diamond Wheel, 5/8" Diamond Knock Out Arbor, For Cutting Brick, Block & Tile, Fast Shallow Cutting, Matrix Design Minimizes Chipping, Steel Body Delivers Constant Depth Of Cut & Advanced Diamond Matrix For Longer Life & Enhanced Material Removal, Lasts Up To 100 Times Longer Than Abrasive Blades, Used On 7" & 7-1/4" Circular, Worm Drive Saws, Carded.