Amana Tool 45910 Core Box 1/2-Inch Diameter by 3/8-Inch Cutting Height by 1/4-Inch Radius by 1/4-Inch Shank Carbide Tipped Router Bit 1/2-inch cutting diameter Radius 1/4-inch 3/8-inch cutting height, 1-1/2-inch length 1/4-inch shank, 2 flute Carbide tipped, industrial quality