Diamond Saw Blade, Blade Dia. 4 in, Arbor Size 7/8 in, Arbor Shape Round, Max. Blade Speed 15,300 RPM, For Use With Saw Type Angle Grinder, -off Saw, Cutting Type Wet/Dry, Rim Type Turbo, Primary Material Application General Purpose, Materials Block, Brick, Concrete, Pavers, Roof Tiles, For Use On Concrete Type Masonry, Grade Good, Blade Material Diamond