60 Grits 4-1/2" 4.5 inch Diamond Circular Saw Blade for Rockwell Rk3441k , Worx WX429L 9.5mm/ 3/8" arbor Tile Grout Concrete, Brick, Block, Masonry Pack of 1 4-/1/2" 60 Grits Diamond Circular Saw Blade for Rockwell, Worx Use for Stone , masonry , tile Material HSS High Speed Steel Fits with Rockwell/ Worx 4/1/2" Arbor size: 3/8"