Standard Pack = 1 piece(s). Flute Length = 5 3/16 IN ; Flute Type = Spiral Flute ; Large End Diameter = 0.505 IN ; Material = High Speed Steel ; Overall Length = 7 3/16 IN ; Shank Type = Straight Shank ; Size = 8 IN ; Size Type = Wire Gage Size ; Small End Diameter = 0.3971 IN ;