FREE SHIP (United States) Remind: This blade is NON Threaded, the inner hole diameter of the cup wheel and convex blade is 7/8″-5/8″. This package carries (a): (a) 30 Piece of 5″ / 5 Inch / 125 mm Diamond cutting blade for stone concrete (inner hole diameter is 7/8″-5/8″)blade color is random: red or silver or gold.