Standard Pack = 1 piece(s). Cutter Diameter = 1.338 IN ; Flute Length = 2 1/8 IN ; Material = High Speed Steel ; Number of Flutes = 4 ; Overall Length = 8 1/8 IN ; Pilot Diameter = 0.891 IN ; Screw Size = 7/8 IN ; Shank Diameter = 7/8 IN ;