7 inch , TSD-T Husqvarna Turbo Rim Diamond Blade, 4 inch Diameter x .080 inch Blade Rim Thickness x .875 inch Or 20 mm Or .625 inch Bushing Arbor Size, Wet Or Dry Masonry, Concrete, Stone, Backer Board, Cement Siding Cutting, Tools, Angle Grinders, Circular Saws, Tile Saws.