MK Diamond 158821 MK-304FC Standard Flush Cutting Blade 4-Inch diameter by .080-Inch wide by 7/8-Inch by 5/8-Inch Arbor 4 by .080 by 7/8 inch-5/8 inch Flush cut blade Standard grade segmented flush cutting blade Standard grade flush cutting blades for tile and concrete Depressed center allows for cutting flush to vertical/horizontal surfaces .625-Inch offset arbor allows blade to cut flush against vertical or horizontal concrete surfaces Heat treated blade core for true running blade 7 millimeter high segments for long blade life