Standard Pack = 1 piece(s). Cutter Diameter = 0.604 IN ; Flute Length = 1 5/8 IN ; Material = High Speed Steel ; Number of Flutes = 4 ; Overall Length = 6 1/2 IN ; Pilot Diameter = 0.406 IN ; Screw Size = 3/8 IN ; Shank Diameter = 1/2 IN ;