4", TSD-T Husqvarna Turbo Rim Diamond Blade, 4" Diameter x .080" Blade Rim Thickness x 7/8" Or 20 mm Or 5/8" Bushing Arbor Size, Wet Or Dry Masonry, Concrete, Stone, Backer Board, Cement Siding Cutting,Tools, Angle Grinders, Circular Saws, Tile Saws.