Amana Tool 45850 Dovetail 2-Flute Carbide Tipped Router Bit with Upper Ball Bearing, 1/4-Inch Shank 14-Degree angle 1/2-Inch cutting diameter, 1/2-Inch cutting height Cutting diameter 3/4-Inch 1/4-Inch shank, 2 flute Carbide tipped, industrial quality