Standard Pack = 1 piece(s). Flute Length = 2 9/16 IN ; Flute Type = Spiral Flute ; Large End Diameter = 0.2604 IN ; Material = High Speed Steel ; Overall Length = 4 1/16 IN ; Shank Type = Straight Shank ; Size = 4 IN ; Size Type = Wire Gage Size ; Small End Diameter = 0.2071 IN ;